- cohesionA TensorMechanicsHardening UserObject that defines hardening of the cohesion
C++ Type:UserObjectName
Controllable:No
Description:A TensorMechanicsHardening UserObject that defines hardening of the cohesion
- compressive_strengthA TensorMechanicsHardening UserObject that defines hardening of the compressive strength. In physical situations this is positive.
C++ Type:UserObjectName
Controllable:No
Description:A TensorMechanicsHardening UserObject that defines hardening of the compressive strength. In physical situations this is positive.
- dilation_angleA TensorMechanicsHardening UserObject that defines hardening of the dilation angle (in radians). Unless you are quite confident, this should be set positive and not greater than the friction angle.
C++ Type:UserObjectName
Controllable:No
Description:A TensorMechanicsHardening UserObject that defines hardening of the dilation angle (in radians). Unless you are quite confident, this should be set positive and not greater than the friction angle.
- friction_angleA TensorMechanicsHardening UserObject that defines hardening of the friction angle (in radians)
C++ Type:UserObjectName
Controllable:No
Description:A TensorMechanicsHardening UserObject that defines hardening of the friction angle (in radians)
- smoothing_tolIntersections of the yield surfaces will be smoothed by this amount (this is measured in units of stress). Often this is related to other physical parameters (eg, 0.1*cohesion) but it is important to set this small enough so that the individual yield surfaces do not mix together in the smoothing process to produce a result where no stress is admissible (for example, mixing together tensile and compressive failure envelopes).
C++ Type:double
Controllable:No
Description:Intersections of the yield surfaces will be smoothed by this amount (this is measured in units of stress). Often this is related to other physical parameters (eg, 0.1*cohesion) but it is important to set this small enough so that the individual yield surfaces do not mix together in the smoothing process to produce a result where no stress is admissible (for example, mixing together tensile and compressive failure envelopes).
- tensile_strengthA TensorMechanicsHardening UserObject that defines hardening of the tensile strength. In physical situations this is positive (and always must be greater than negative compressive-strength.
C++ Type:UserObjectName
Controllable:No
Description:A TensorMechanicsHardening UserObject that defines hardening of the tensile strength. In physical situations this is positive (and always must be greater than negative compressive-strength.
- yield_function_tolThe return-map process will be deemed to have converged if all yield functions are within yield_function_tol of zero. If this is set very low then precision-loss might be encountered: if the code detects precision loss then it also deems the return-map process has converged.
C++ Type:double
Controllable:No
Description:The return-map process will be deemed to have converged if all yield functions are within yield_function_tol of zero. If this is set very low then precision-loss might be encountered: if the code detects precision loss then it also deems the return-map process has converged.
CappedMohrCoulombStressUpdate
buildconstruction:Undocumented Class
The CappedMohrCoulombStressUpdate has not been documented. The content listed below should be used as a starting point for documenting the class, which includes the typical automatic documentation associated with a MooseObject; however, what is contained is ultimately determined by what is necessary to make the documentation clear for users.
Nonassociative, smoothed, Mohr-Coulomb plasticity capped with tensile (Rankine) and compressive caps, with hardening/softening
Overview
Example Input File Syntax
Input Parameters
- admissible_stressA single admissible value of the value of the stress parameters for internal parameters = 0. This is used to initialize the return-mapping algorithm during the first nonlinear iteration. If not given then it is assumed that stress parameters = 0 is admissible.
C++ Type:std::vector<double>
Controllable:No
Description:A single admissible value of the value of the stress parameters for internal parameters = 0. This is used to initialize the return-mapping algorithm during the first nonlinear iteration. If not given then it is assumed that stress parameters = 0 is admissible.
- base_nameOptional parameter that defines a prefix for all material properties related to this stress update model. This allows for multiple models of the same type to be used without naming conflicts.
C++ Type:std::string
Controllable:No
Description:Optional parameter that defines a prefix for all material properties related to this stress update model. This allows for multiple models of the same type to be used without naming conflicts.
- blockThe list of blocks (ids or names) that this object will be applied
C++ Type:std::vector<SubdomainName>
Controllable:No
Description:The list of blocks (ids or names) that this object will be applied
- boundaryThe list of boundaries (ids or names) from the mesh where this boundary condition applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundaries (ids or names) from the mesh where this boundary condition applies
- constant_onNONEWhen ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped
Default:NONE
C++ Type:MooseEnum
Options:NONE, ELEMENT, SUBDOMAIN
Controllable:No
Description:When ELEMENT, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps.When SUBDOMAIN, MOOSE will only call computeQpProperties() for the 0th quadrature point, and then copy that value to the other qps. Evaluations on element qps will be skipped
- declare_suffixAn optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Controllable:No
Description:An optional suffix parameter that can be appended to any declared properties. The suffix will be prepended with a '_' character.
- max_NR_iterations20Maximum number of Newton-Raphson iterations allowed during the return-map algorithm
Default:20
C++ Type:unsigned int
Controllable:No
Description:Maximum number of Newton-Raphson iterations allowed during the return-map algorithm
- min_step_size1In order to help the Newton-Raphson procedure, the applied strain increment may be applied in sub-increments of size greater than this value. Usually it is better for Moose's nonlinear convergence to increase max_NR_iterations rather than decrease this parameter.
Default:1
C++ Type:double
Controllable:No
Description:In order to help the Newton-Raphson procedure, the applied strain increment may be applied in sub-increments of size greater than this value. Usually it is better for Moose's nonlinear convergence to increase max_NR_iterations rather than decrease this parameter.
- perfect_guessTrueProvide a guess to the Newton-Raphson procedure that is the result from perfect plasticity. With severe hardening/softening this may be suboptimal.
Default:True
C++ Type:bool
Controllable:No
Description:Provide a guess to the Newton-Raphson procedure that is the result from perfect plasticity. With severe hardening/softening this may be suboptimal.
- perform_finite_strain_rotationsFalseTensors are correctly rotated in finite-strain simulations. For optimal performance you can set this to 'false' if you are only ever using small strains
Default:False
C++ Type:bool
Controllable:No
Description:Tensors are correctly rotated in finite-strain simulations. For optimal performance you can set this to 'false' if you are only ever using small strains
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- warn_about_precision_lossFalseOutput a message to the console every time precision-loss is encountered during the Newton-Raphson process
Default:False
C++ Type:bool
Controllable:No
Description:Output a message to the console every time precision-loss is encountered during the Newton-Raphson process
Optional Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Controllable:No
Description:Determines whether this object is calculated using an implicit or explicit form
- seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Controllable:No
Description:The seed for the master random number generator
- smoother_function_typecosType of smoother function to use. 'cos' means (-a/pi)cos(pi x/2/a), 'polyN' means a polynomial of degree 2N+2
Default:cos
C++ Type:MooseEnum
Options:cos, poly1, poly2, poly3
Controllable:No
Description:Type of smoother function to use. 'cos' means (-a/pi)cos(pi x/2/a), 'polyN' means a polynomial of degree 2N+2
- use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Advanced Parameters
- output_propertiesList of material properties, from this material, to output (outputs must also be defined to an output type)
C++ Type:std::vector<std::string>
Controllable:No
Description:List of material properties, from this material, to output (outputs must also be defined to an output type)
- outputsnone Vector of output names were you would like to restrict the output of variables(s) associated with this object
Default:none
C++ Type:std::vector<OutputName>
Controllable:No
Description:Vector of output names were you would like to restrict the output of variables(s) associated with this object
Outputs Parameters
Input Files
- (modules/tensor_mechanics/test/tests/jacobian/mc_update2.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update33.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update1.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random4.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform8.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard3.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update4.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform3.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform23.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update3.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random1.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random2.i)
- (modules/tensor_mechanics/test/tests/notched_plastic_block/cmc_smooth.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform19.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update24.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform17.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform12.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random5.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update6.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update12.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform9.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform6.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform24.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform21.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update15.i)
- (modules/tensor_mechanics/test/tests/notched_plastic_block/biaxial_smooth.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update17.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update23.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform22.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random3.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform11.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update21.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update16.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard22.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform18.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform2.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform7.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform1.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update11.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard21.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform13.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update7.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform25.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform16.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update22.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform15.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update14.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update34.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update13.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update5.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update8.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard13.i)
- (modules/tensor_mechanics/test/tests/jacobian/mc_update18.i)
- (modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform5.i)
Child Objects
(modules/tensor_mechanics/test/tests/jacobian/mc_update2.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_I = stress_II ~1 edge
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 0 0 0 0 0 0 0 2.01'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update33.i)
# MC update version, with only MohrCoulomb, cohesion=40, friction angle = 35deg, psi = 5deg, smoothing_tol = 0.5
# Compressive strength = 1MPa
# Lame lambda = 1E3. Lame mu = 1.3E3
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 4E1
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 0.5
shear_modulus = 1.0
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-10 -12 14 -12 -5 -20 14 -20 -8'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update1.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_I = 1 plane
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 0 0 0 0 0 0 0 -2'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random4.i)
# Using CappedMohrCoulomb
# Plasticity models:
# Tensile strength = 0.1MPa
# Compressive strength = 1.0MPa
# Cohesion = 1MPa
# Friction angle = dilation angle = 0.5
#
# Lame lambda = 1GPa. Lame mu = 1.3GPa
#
# A line of elements is perturbed randomly, and return to the yield surface at each quadpoint is checked
[Mesh]
type = GeneratedMesh
dim = 3
nx = 100
ny = 12
nz = 1
xmin = 0
xmax = 100
ymin = 0
ymax = 12
zmin = 0
zmax = 1
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[ICs]
[./x]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_x
[../]
[./y]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_y
[../]
[./z]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_z
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./f3]
order = CONSTANT
family = MONOMIAL
[../]
[./f4]
order = CONSTANT
family = MONOMIAL
[../]
[./f5]
order = CONSTANT
family = MONOMIAL
[../]
[./f6]
order = CONSTANT
family = MONOMIAL
[../]
[./f7]
order = CONSTANT
family = MONOMIAL
[../]
[./f8]
order = CONSTANT
family = MONOMIAL
[../]
[./f9]
order = CONSTANT
family = MONOMIAL
[../]
[./f10]
order = CONSTANT
family = MONOMIAL
[../]
[./f11]
order = CONSTANT
family = MONOMIAL
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./int1]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./f3]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 3
variable = f3
[../]
[./f4]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 4
variable = f4
[../]
[./f5]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 5
variable = f5
[../]
[./f6]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 6
variable = f6
[../]
[./f7]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 7
variable = f7
[../]
[./f8]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 8
variable = f8
[../]
[./f9]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 9
variable = f9
[../]
[./f10]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 10
variable = f10
[../]
[./f11]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 11
variable = f11
[../]
[./int0]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = int0
[../]
[./int1]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = int1
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./tot_iters]
type = ElementIntegralMaterialProperty
mat_prop = plastic_NR_iterations
outputs = console
[../]
[./intnl0_max]
type = ElementExtremeValue
variable = int0
outputs = console
[../]
[./intnl1_max]
type = ElementExtremeValue
variable = int1
outputs = console
[../]
[./raw_f0]
type = ElementExtremeValue
variable = f0
outputs = console
[../]
[./raw_f1]
type = ElementExtremeValue
variable = f1
outputs = console
[../]
[./raw_f2]
type = ElementExtremeValue
variable = f2
outputs = console
[../]
[./raw_f3]
type = ElementExtremeValue
variable = f3
outputs = console
[../]
[./raw_f4]
type = ElementExtremeValue
variable = f4
outputs = console
[../]
[./raw_f5]
type = ElementExtremeValue
variable = f5
outputs = console
[../]
[./raw_f6]
type = ElementExtremeValue
variable = f6
outputs = console
[../]
[./raw_f7]
type = ElementExtremeValue
variable = f7
outputs = console
[../]
[./raw_f8]
type = ElementExtremeValue
variable = f8
outputs = console
[../]
[./raw_f9]
type = ElementExtremeValue
variable = f9
outputs = console
[../]
[./raw_f10]
type = ElementExtremeValue
variable = f10
outputs = console
[../]
[./raw_f11]
type = ElementExtremeValue
variable = f11
outputs = console
[../]
[./iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./f0]
type = FunctionValuePostprocessor
function = should_be_zero0_fcn
[../]
[./f1]
type = FunctionValuePostprocessor
function = should_be_zero1_fcn
[../]
[./f2]
type = FunctionValuePostprocessor
function = should_be_zero2_fcn
[../]
[./f3]
type = FunctionValuePostprocessor
function = should_be_zero3_fcn
[../]
[./f4]
type = FunctionValuePostprocessor
function = should_be_zero4_fcn
[../]
[./f5]
type = FunctionValuePostprocessor
function = should_be_zero5_fcn
[../]
[./f6]
type = FunctionValuePostprocessor
function = should_be_zero6_fcn
[../]
[./f7]
type = FunctionValuePostprocessor
function = should_be_zero7_fcn
[../]
[./f8]
type = FunctionValuePostprocessor
function = should_be_zero8_fcn
[../]
[./f9]
type = FunctionValuePostprocessor
function = should_be_zero9_fcn
[../]
[./f10]
type = FunctionValuePostprocessor
function = should_be_zero10_fcn
[../]
[./f11]
type = FunctionValuePostprocessor
function = should_be_zero11_fcn
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f0'
[../]
[./should_be_zero1_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f1'
[../]
[./should_be_zero2_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f2'
[../]
[./should_be_zero3_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f3'
[../]
[./should_be_zero4_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f4'
[../]
[./should_be_zero5_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f5'
[../]
[./should_be_zero6_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f6'
[../]
[./should_be_zero7_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f7'
[../]
[./should_be_zero8_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f8'
[../]
[./should_be_zero9_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f9'
[../]
[./should_be_zero10_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f10'
[../]
[./should_be_zero11_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f11'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1E6
value_residual = 2E6
internal_limit = 1
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1E7
value_residual = 0.5E7
internal_limit = 1
[../]
[./coh]
type = TensorMechanicsHardeningCubic
value_0 = 2E6
value_residual = 1E6
internal_limit = 1
[../]
[./phi]
type = TensorMechanicsHardeningCubic
value_0 = 0.6
value_residual = 0.2
internal_limit = 1
[../]
[./psi]
type = TensorMechanicsHardeningCubic
value_0 = 0.5
value_residual = 0.1
internal_limit = 1
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 1E5
max_NR_iterations = 1000
yield_function_tol = 1.0E-1
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
dtmin = 1
type = Transient
[]
[Outputs]
file_base = random4
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform8.i)
# Using CappedMohrCoulomb with tensile failure only
# A single unit element is stretched by 1E-6m in z direction.
# with Lame lambda = 0.6E6 and Lame mu (shear) = 1E6
# stress_zz = 2.6 Pa
# stress_xx = 0.6 Pa
# stress_yy = 0.6 Pa
# tensile_strength is set to 0.5Pa
#
# stress_zz = 0.5
# plastic multiplier = 2.1/2.6 E-6
# stress_xx = 0.6 - (2.1/2.6*0.6) = 0.115
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1.0E-6*z'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f0]
type = PointValue
point = '0 0 0'
variable = f0
[../]
[./f1]
type = PointValue
point = '0 0 0'
variable = f1
[../]
[./f2]
type = PointValue
point = '0 0 0'
variable = f2
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0.6E6 1E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform8
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard3.i)
# Using CappedMohrCoulomb with tensile failure only
# checking for small deformation, with cubic hardening
# A single element is repeatedly stretched in z direction
# tensile_strength is set to 1Pa, tensile_strength_residual = 0.5Pa, and limit value = 1E-5
# This allows the hardening of the tensile strength to be observed
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '2E-6*z*t'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1.0
value_residual = 0.5
internal_0 = 0
internal_limit = 1E-5
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 10
dt = 1.0
type = Transient
[]
[Outputs]
file_base = small_deform_hard3
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update4.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 -1 0.5 1 1.9 0 0.5 0 3'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform3.i)
# Using CappedMohrCoulomb with tensile failure only
# checking for small deformation
# A single element is stretched by "ep" in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = sigma_II
# where sigma_I = (E_2222 + E_2200) * ep
# tensile_strength is set to 1Pa, smoothing_tol = 0.1Pa
# The smoothed yield function is
# yf = sigma_I + ismoother(0) - tensile_strength
# = sigma_I + (0.5 * smoothing_tol - smoothing_tol / Pi) - tensile_strength
# = sigma_I - 0.98183
#
# With zero Poisson's ratio, the return stress will be
# stress_00 = stress_22 = 0.98183
# with all other stress components being zero
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.25E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0.25E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform3
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform23.i)
# apply repeated stretches in x z directions, and smaller stretches along the y direction,
# so that sigma_max = sigma_mid (approximately),
# which means that lode angle = 30deg.
# The allows yield surface in meridional plane to be mapped out
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '1E-6*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.25E-6*y*sin(t)'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-6*z*t'
[../]
[]
[AuxVariables]
[./mc_int]
order = CONSTANT
family = MONOMIAL
[../]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./mc_int_auxk]
type = MaterialStdVectorAux
index = 0
property = plastic_internal_parameter
variable = mc_int
[../]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./internal]
type = PointValue
point = '0 0 0'
variable = mc_int
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 1E7'
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 5.0
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 30
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform23
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update3.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_I = stress_II = stress_III ~1 tip
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 0 0 0 1.9 0 0 0 2.1'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random1.i)
# Using CappedMohrCoulomb with tensile failure only
# Plasticity models:
# Tensile strength = 1MPa
#
# Lame lambda = 1GPa. Lame mu = 1.3GPa
#
# A line of elements is perturbed randomly, and return to the yield surface at each quadpoint is checked
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1000
ny = 1234
nz = 1
xmin = 0
xmax = 1000
ymin = 0
ymax = 1234
zmin = 0
zmax = 1
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[ICs]
[./x]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_x
[../]
[./y]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_y
[../]
[./z]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_z
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./int0]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 0
variable = int0
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./tot_iters]
type = ElementIntegralMaterialProperty
mat_prop = plastic_NR_iterations
outputs = console
[../]
[./raw_f0]
type = ElementExtremeValue
variable = f0
outputs = console
[../]
[./raw_f1]
type = ElementExtremeValue
variable = f1
outputs = console
[../]
[./raw_f2]
type = ElementExtremeValue
variable = f2
outputs = console
[../]
[./iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./f0]
type = FunctionValuePostprocessor
function = should_be_zero0_fcn
[../]
[./f1]
type = FunctionValuePostprocessor
function = should_be_zero1_fcn
[../]
[./f2]
type = FunctionValuePostprocessor
function = should_be_zero2_fcn
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f0'
[../]
[./should_be_zero1_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f1'
[../]
[./should_be_zero2_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f2'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1E6
value_residual = 0
internal_limit = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 1E5
max_NR_iterations = 100
yield_function_tol = 1.0E-1
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = random1
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random2.i)
# Using CappedMohrCoulomb with compressive failure only
# Plasticity models:
# Compressive strength = 1 MPa
#
# Lame lambda = 1GPa. Lame mu = 1.3GPa
#
# A line of elements is perturbed randomly, and return to the yield surface at each quadpoint is checked
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1234
nz = 1
xmin = 0
xmax = 1
ymin = 0
ymax = 1234
zmin = 0
zmax = 1
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[ICs]
[./x]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_x
[../]
[./y]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_y
[../]
[./z]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_z
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./int0]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 0
variable = int0
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./tot_iters]
type = ElementIntegralMaterialProperty
mat_prop = plastic_NR_iterations
outputs = console
[../]
[./raw_f0]
type = ElementExtremeValue
variable = f0
outputs = console
[../]
[./raw_f1]
type = ElementExtremeValue
variable = f1
outputs = console
[../]
[./raw_f2]
type = ElementExtremeValue
variable = f2
outputs = console
[../]
[./iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./f0]
type = FunctionValuePostprocessor
function = should_be_zero0_fcn
[../]
[./f1]
type = FunctionValuePostprocessor
function = should_be_zero1_fcn
[../]
[./f2]
type = FunctionValuePostprocessor
function = should_be_zero2_fcn
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f0'
[../]
[./should_be_zero1_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f1'
[../]
[./should_be_zero2_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f2'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1E6
value_residual = 0
internal_limit = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 1E5
max_NR_iterations = 100
yield_function_tol = 1.0E-1
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = random2
csv = true
[]
(modules/tensor_mechanics/test/tests/notched_plastic_block/cmc_smooth.i)
# Uses a multi-smoothed version of capped-Mohr-Coulomb (via CappedMohrCoulombStressUpdate and ComputeMultipleInelasticStress) to simulate the following problem.
# A cubical block is notched around its equator.
# All of its outer surfaces have roller BCs, but the notched region is free to move as needed
# The block is initialised with a high hydrostatic tensile stress
# Without the notch, the BCs do not allow contraction of the block, and this stress configuration is admissible
# With the notch, however, the interior parts of the block are free to move in order to relieve stress, and this causes plastic failure
# The top surface is then pulled upwards (the bottom is fixed because of the roller BCs)
# This causes more failure
[Mesh]
[generated_mesh]
type = GeneratedMeshGenerator
dim = 3
nx = 9
ny = 9
nz = 9
xmin = 0
xmax = 0.1
ymin = 0
ymax = 0.1
zmin = 0
zmax = 0.1
[]
[block_to_remove_xmin]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 -0.01 0.045'
top_right = '0.01 0.11 0.055'
location = INSIDE
block_id = 1
input = generated_mesh
[]
[block_to_remove_xmax]
type = SubdomainBoundingBoxGenerator
bottom_left = '0.09 -0.01 0.045'
top_right = '0.11 0.11 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_xmin
[]
[block_to_remove_ymin]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 -0.01 0.045'
top_right = '0.11 0.01 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_xmax
[]
[block_to_remove_ymax]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 0.09 0.045'
top_right = '0.11 0.11 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_ymin
[]
[remove_block]
type = BlockDeletionGenerator
block = 1
input = block_to_remove_ymax
[]
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_zz'
eigenstrain_names = ini_stress
[../]
[]
[Postprocessors]
[./uz]
type = PointValue
point = '0 0 0.1'
use_displaced_mesh = false
variable = disp_z
[../]
[./s_zz]
type = ElementAverageValue
use_displaced_mesh = false
variable = stress_zz
[../]
[./num_res]
type = NumResidualEvaluations
[../]
[./nr_its] # num_iters is the average number of NR iterations encountered per element in this timestep
type = ElementAverageValue
variable = num_iters
[../]
[./max_nr_its] # max_num_iters is the maximum number of NR iterations encountered in the element during the whole simulation
type = ElementExtremeValue
variable = max_num_iters
[../]
[./runtime]
type = PerfGraphData
data_type = TOTAL
section_name = 'Root'
[../]
[]
[BCs]
# back=zmin, front=zmax, bottom=ymin, top=ymax, left=xmin, right=xmax
[./xmin_xzero]
type = DirichletBC
variable = disp_x
boundary = left
value = 0.0
[../]
[./xmax_xzero]
type = DirichletBC
variable = disp_x
boundary = right
value = 0.0
[../]
[./ymin_yzero]
type = DirichletBC
variable = disp_y
boundary = bottom
value = 0.0
[../]
[./ymax_yzero]
type = DirichletBC
variable = disp_y
boundary = top
value = 0.0
[../]
[./zmin_zzero]
type = DirichletBC
variable = disp_z
boundary = back
value = '0'
[../]
[./zmax_disp]
type = FunctionDirichletBC
variable = disp_z
boundary = front
function = '1E-6*max(t,0)'
[../]
[]
[AuxVariables]
[./mc_int]
order = CONSTANT
family = MONOMIAL
[../]
[./num_iters]
order = CONSTANT
family = MONOMIAL
[../]
[./max_num_iters]
order = CONSTANT
family = MONOMIAL
[../]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./mc_int_auxk]
type = MaterialStdVectorAux
index = 0
property = plastic_internal_parameter
variable = mc_int
[../]
[./num_iters_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = num_iters
[../]
[./max_num_iters_auxk]
type = MaterialRealAux
property = max_plastic_NR_iterations
variable = max_num_iters
[../]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 0
property = plastic_yield_function
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 3E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E16
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 5E6
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 10
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 16E9
poissons_ratio = 0.25
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 0.2E6
yield_function_tol = 1E-5
perfect_guess = false # this is so we can observe some Newton-Raphson iterations, for comparison with other models, and it is not optimal in any real-life simulations
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[./strain_from_initial_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2.5E6 0 0 0 2.5E6 0 0 0 2.5E6'
eigenstrain_name = ini_stress
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
[../]
[]
[Executioner]
start_time = -1
end_time = 10
dt = 1
solve_type = NEWTON
type = Transient
l_tol = 1E-2
nl_abs_tol = 1E-5
nl_rel_tol = 1E-7
l_max_its = 200
nl_max_its = 400
petsc_options_iname = '-pc_type -pc_asm_overlap -sub_pc_type -ksp_type -ksp_gmres_restart'
petsc_options_value = ' asm 2 lu gmres 200'
[]
[Outputs]
file_base = cmc_smooth
perf_graph = true
exodus = false
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform19.i)
# Using CappedMohrCoulomb with compressive failure only
# A single unit element is stretched in a complicated way
# that the trial stress is
#
# -1.2 -2.0 -0.8
# -2.0 4.4 0
# -0.8 0 2.8
#
# This has eigenvalues
# la = {-1.963, 2.89478, 5.06822}
# and eigenvectors
# {0.94197, 0.296077, 0.158214}
# {-0.116245, -0.154456, 0.981137},
# {-0.314929, 0.942593, 0.111075},
#
# The compressive strength is 0.5 and Young=1 and Poisson=0.25.
# The return-map algorithm should return to stress_min = -0.5
# This is an increment of 1.463, so stress_mid and stress_max
# should both increase by 1.463 v/(1-v) = 0.488, giving
# stress_mid = 3.382
# stress_max = 5.556
#
# E_22 = E(1-v)/(1+v)/(1-2v)=1.2 and E_02 = E_22 v/(1-v)
# gamma_shear = ((smax-smin)^trial - (smax-smin)) / (E_22 - E_02)
# = ((2v-1)/(1-v)) * (smin^trial - smin) / (E_22(1 - 2v)/(1-v))
# = -(smin^trial - smin) / E_22
# Using psi = 30deg, sin(psi) = 1/2
# the shear correction to the tensile internal parameter is
# gamma_shear (E_22 + E_20) sin(psi) = gamma_shear E_22 sin(psi) / (1 - v)
# = -(smin^trial - smin) / (1 - v) / 2
# Then the tensile internal parameter is
# (1 - v) * (reduction_of_(max+min)_principal - gamma_shear * E_22 / (1-v) / 2) / E_22
# = -1.829
#
# The final stress is
#
# {0.15, -1.7, -0.65},
# {-1.7, 4.97, 0.046},
# {-0.65, 0.046, 3.3}
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-(3*x+2*y+z)'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '-(3*x-4*y)'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-(x-2*z)'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f0]
type = PointValue
point = '0 0 0'
variable = f0
[../]
[./f1]
type = PointValue
point = '0 0 0'
variable = f1
[../]
[./f2]
type = PointValue
point = '0 0 0'
variable = f2
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1
poissons_ratio = 0.25
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.001
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform19
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update24.i)
# MC update version, with only MohrCoulomb, cohesion=40, friction angle = 35deg, psi = 5deg, smoothing_tol = 0.5
# Tensile strength = 1MPa
# Lame lambda = 1E3. Lame mu = 1.3E3
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E2
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E8
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 4E1
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '100.1 0.1 -0.2 0.1 0.9 0 -0.2 0 1.1'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform17.i)
# Using CappedMohrCoulomb with compressive failure only
# A single element is incrementally compressed
# This causes the return direction to be along the hypersurface sigma_II = sigma_III
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-2*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '-2*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-0.4*z*(t+2*t*t)'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 3
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform17
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform12.i)
# Using CappedMohrCoulomb with compressive failure only
# checking for small deformation
# A single element is stretched equally in all directions.
# This causes the return direction to be along the sigma_I = sigma_II = sigma_III line
# compressive_strength is set to 1Pa, and smoothing_tol = 0.1Pa
# The smoothed yield function comes from two smoothing operations.
# The first is on sigma_I and sigma_II (sigma_I >= sigma_II >= sigma_III):
# yf = -sigma_I + ismoother(0) - compressive_strength
# = -sigma_I + (0.5 * smoothing_tol - smoothing_tol / Pi) - compressive_strength
# = -sigma_I + 0.018169 - 1
# The second has the argument of ismoother equal to -0.018169.
# ismoother(-0.018169) = 0.5 * (-0.018169 + 0.1) - 0.1 * cos (0.5 * Pi * -0.018169 / 0.1) / Pi
# = 0.010372
# So the final yield function is
# yf = -sigma_I + 0.018169 + 0.010372 - 1 = -sigma_I + 0.028541 - 1
# However, because of the asymmetry in smoothing (the yield function is obtained
# by first smoothing -sigma_I-cs and -sigma_II-cs, and then by smoothing this
# result with -sigma_III-cs) the result is sigma_I > sigma_II = sigma_III
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-1E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '-1E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-1E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform12
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random5.i)
# Using CappedMohrCoulomb
# Plasticity models:
# Tensile strength = 1.5
# Compressive strength = 3.0
# Cohesion = 1.0
# Friction angle = dilation angle = 20deg
#
# Young = 1, Poisson = 0.3
#
# A line of elements is perturbed randomly, and return to the yield surface at each quadpoint is checked
[Mesh]
type = GeneratedMesh
dim = 3
nx = 100
ny = 12
nz = 1
xmin = 0
xmax = 100
ymin = 0
ymax = 12
zmin = 0
zmax = 1
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[ICs]
[./x]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_x
[../]
[./y]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_y
[../]
[./z]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_z
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./Smax]
order = CONSTANT
family = MONOMIAL
[../]
[./Smid]
order = CONSTANT
family = MONOMIAL
[../]
[./Smin]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./Smax]
type = RankTwoScalarAux
rank_two_tensor = stress
variable = Smax
scalar_type = MaxPrincipal
[../]
[./Smid]
type = RankTwoScalarAux
rank_two_tensor = stress
variable = Smid
scalar_type = MidPrincipal
[../]
[./Smin]
type = RankTwoScalarAux
rank_two_tensor = stress
variable = Smin
scalar_type = MinPrincipal
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1.5
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 3.0
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1.0
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 20
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 3
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 100
poissons_ratio = 0.3
[../]
[./strain]
type = ComputeFiniteStrain
displacements = 'disp_x disp_y disp_z'
[../]
[./capped_mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 0.2
yield_function_tol = 1.0E-12
max_NR_iterations = 1000
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = capped_mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = random5
exodus = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update6.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to the plane of tensile yield
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-1 0.1 0.2 0.1 15 -0.3 0.2 -0.3 0'
eigenstrain_name = ini_stress
[../]
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update12.i)
# MC update version, with only compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_I = stress_II ~1 edge
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-2 0 0 0 0 0 0 0 -2.01'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform9.i)
# Using CappedMohrCoulomb with tensile failure only
# A single unit element is stretched in a complicated way
# that the trial stress is
#
# 1.16226 -0.0116587 0.0587872
# -0.0116587 1.12695 0.0779428
# 0.0587872 0.0779428 0.710169
#
# This has eigenvalues
# la = {0.68849, 1.14101, 1.16987}
# and eigenvectors
#
# {-0.125484, -0.176871, 0.976202}
# {-0.0343704, -0.982614, -0.182451}
# {0.9915, -0.0564471, 0.117223}
#
# The tensile strength is 0.5 and Young=1 and Poisson=0.25.
# Using smoothing_tol=0.01, the return-map algorithm should
# return to, approximately, stress_I=stress_II=0.5. This
# is a reduction of 0.66, so stress_III is approximately
# 0.68849 - v * 0.66 * 2 = 0.68849 - 0.25 * 0.66 * 2 = 0.36.
#
# E_22 = E(1-v)/(1+v)/(1-2v) = 1.2, and E_02 = E_22 v/(1-v)
# gamma_shear = ((smax-smin)^trial - (smax-smin)) / (E_22 - E_02)
# = (1-2v) * (smax^trial - smax) / (E_22(1 - 2v)/(1-v))
# = (1 - v) * (smax^trial - smax) / E_22
# Using psi = 30deg, sin(psi) = 1/2
# the shear correction to the tensile internal parameter is
# gamma_shear (E_22 + E_20) sin(psi) = gamma_shear E_22 sin(psi) / (1 - v)
# = gamma_shear E_22 / (1 - v) / 2
# Then the tensile internal parameter is
# (1 - v) * (reduction_of_(max+min)_principal - gamma_shear * E_22 / (1-v) / 2) / E_22
# = (1-v)(1+2v)(smax^trial - smax)/E_22 - gamma_shear / 2
# = 0.41 (approximately)
#
# The final stress is
#
# {0.498, -0.003, 0.017},
# {-0.003, 0.495, 0.024},
# {0.017, 0.024, 0.367}
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
strain = finite
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '3*x+2*y+z'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '3*x-4*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = 'x-2*z'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f0]
type = PointValue
point = '0 0 0'
variable = f0
[../]
[./f1]
type = PointValue
point = '0 0 0'
variable = f1
[../]
[./f2]
type = PointValue
point = '0 0 0'
variable = f2
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1
poissons_ratio = 0.25
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.001
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform9
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform6.i)
# Using CappedMohrCoulomb with tensile failure only
# A single element is incrementally stretched in the in the z direction
# This causes the return direction to be along the hypersurface sigma_II = sigma_III,
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
strain = finite
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '4*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = 'y*(t-0.5)'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = 'z*(t-0.5)'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform6
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform24.i)
# apply repeated stretches in z directions, and smaller stretches along the x and y directions,
# so that sigma_mid = sigma_min (approximately),
# which means that lode angle = -30deg.
# The allows yield surface in meridional plane to be mapped out
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.25E-6*x*sin(t)'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.25E-6*y*sin(t)'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-6*z*t'
[../]
[]
[AuxVariables]
[./mc_int]
order = CONSTANT
family = MONOMIAL
[../]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./mc_int_auxk]
type = MaterialStdVectorAux
index = 0
property = plastic_internal_parameter
variable = mc_int
[../]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./internal]
type = PointValue
point = '0 0 0'
variable = mc_int
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 1E7'
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 5.0
yield_function_tol = 1.0E-7
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 30
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform24
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform21.i)
# Mohr-Coulomb only
# apply repeated stretches in x, y and z directions, so that mean_stress = 0
# This maps out the yield surface in the octahedral plane for zero mean stress
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '2E-6*x*sin(t)'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '2E-6*y*sin(2*t)'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-2E-6*z*(sin(t)+sin(2*t))'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./f0]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./f1]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 20
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 1E-12
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 1E7'
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 1
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 100
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform21
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update15.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to close to the tip of the yield function.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-15 -1 -0.2 -1 -10 0.3 0.3 -0.2 -8'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/notched_plastic_block/biaxial_smooth.i)
# Uses a multi-smooted version of Mohr-Coulomb (via CappedMohrCoulombStressUpdate and ComputeMultipleInelasticStress) to simulate the following problem.
# A cubical block is notched around its equator.
# All of its outer surfaces have roller BCs, but the notched region is free to move as needed
# The block is initialised with a high hydrostatic tensile stress
# Without the notch, the BCs do not allow contraction of the block, and this stress configuration is admissible
# With the notch, however, the interior parts of the block are free to move in order to relieve stress, and this causes plastic failure
# The top surface is then pulled upwards (the bottom is fixed because of the roller BCs)
# This causes more failure
[Mesh]
[generated_mesh]
type = GeneratedMeshGenerator
dim = 3
nx = 9
ny = 9
nz = 9
xmin = 0
xmax = 0.1
ymin = 0
ymax = 0.1
zmin = 0
zmax = 0.1
[]
[block_to_remove_xmin]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 -0.01 0.045'
top_right = '0.01 0.11 0.055'
location = INSIDE
block_id = 1
input = generated_mesh
[]
[block_to_remove_xmax]
type = SubdomainBoundingBoxGenerator
bottom_left = '0.09 -0.01 0.045'
top_right = '0.11 0.11 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_xmin
[]
[block_to_remove_ymin]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 -0.01 0.045'
top_right = '0.11 0.01 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_xmax
[]
[block_to_remove_ymax]
type = SubdomainBoundingBoxGenerator
bottom_left = '-0.01 0.09 0.045'
top_right = '0.11 0.11 0.055'
location = INSIDE
block_id = 1
input = block_to_remove_ymin
[]
[remove_block]
type = BlockDeletionGenerator
block = 1
input = block_to_remove_ymax
[]
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_zz'
eigenstrain_names = ini_stress
[../]
[]
[Postprocessors]
[./uz]
type = PointValue
point = '0 0 0.1'
use_displaced_mesh = false
variable = disp_z
[../]
[./s_zz]
type = ElementAverageValue
use_displaced_mesh = false
variable = stress_zz
[../]
[./num_res]
type = NumResidualEvaluations
[../]
[./nr_its] # num_iters is the average number of NR iterations encountered per element in this timestep
type = ElementAverageValue
variable = num_iters
[../]
[./max_nr_its] # max_num_iters is the maximum number of NR iterations encountered in the element during the whole simulation
type = ElementExtremeValue
variable = max_num_iters
[../]
[./runtime]
type = PerfGraphData
data_type = TOTAL
section_name = 'Root'
[../]
[]
[BCs]
# back=zmin, front=zmax, bottom=ymin, top=ymax, left=xmin, right=xmax
[./xmin_xzero]
type = DirichletBC
variable = disp_x
boundary = left
value = 0.0
[../]
[./xmax_xzero]
type = DirichletBC
variable = disp_x
boundary = right
value = 0.0
[../]
[./ymin_yzero]
type = DirichletBC
variable = disp_y
boundary = bottom
value = 0.0
[../]
[./ymax_yzero]
type = DirichletBC
variable = disp_y
boundary = top
value = 0.0
[../]
[./zmin_zzero]
type = DirichletBC
variable = disp_z
boundary = back
value = '0'
[../]
[./zmax_disp]
type = FunctionDirichletBC
variable = disp_z
boundary = front
function = '1E-6*max(t,0)'
[../]
[]
[AuxVariables]
[./mc_int]
order = CONSTANT
family = MONOMIAL
[../]
[./num_iters]
order = CONSTANT
family = MONOMIAL
[../]
[./max_num_iters]
order = CONSTANT
family = MONOMIAL
[../]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./mc_int_auxk]
type = MaterialStdVectorAux
index = 0
property = plastic_internal_parameter
variable = mc_int
[../]
[./num_iters_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = num_iters
[../]
[./max_num_iters_auxk]
type = MaterialRealAux
property = max_plastic_NR_iterations
variable = max_num_iters
[../]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E16
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 5E6
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 10
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 16E9
poissons_ratio = 0.25
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 0.2E6
yield_function_tol = 1E-5
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[./strain_from_initial_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '6E6 0 0 0 6E6 0 0 0 6E6'
eigenstrain_name = ini_stress
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
[../]
[]
[Executioner]
start_time = -1
end_time = 10
dt = 1
solve_type = NEWTON
type = Transient
l_tol = 1E-2
nl_abs_tol = 1E-5
nl_rel_tol = 1E-7
l_max_its = 200
nl_max_its = 400
petsc_options_iname = '-pc_type -pc_asm_overlap -sub_pc_type -ksp_type -ksp_gmres_restart'
petsc_options_value = ' asm 2 lu gmres 200'
[]
[Outputs]
file_base = biaxial_smooth
perf_graph = true
exodus = false
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update17.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to close to the edge of compressive yield
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '1 -0.1 -0.2 -0.1 -15 0.3 -0.2 0.3 -14'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update23.i)
# MC update version, with only MohrCoulomb, cohesion=40, friction angle = 35deg, psi = 5deg, smoothing_tol = 0.5
# Tensile strength = 1MPa
# Lame lambda = 1E3. Lame mu = 1.3E3
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 4E1
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 0.5
shear_modulus = 1.0
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '10 12 -14 12 5 20 -14 20 8'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform22.i)
# Mohr-Coulomb only
# apply stretches in x direction and smaller stretches in the y direction
# to observe return to the MC plane
# This tests uses hardening of the cohesion. The returned configuration
# should obey
# 0 = 0.5 * (Smax - Smin) + 0.5 * (Smax + Smin) * sin(phi) - C cos(phi)
# which allows inference of C.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.4E-6*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.1E-6*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[]
[Postprocessors]
[./s_max]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_mid]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_min]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningCubic
value_0 = 10
value_residual = 20
internal_limit = 5E-6
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1E7
poissons_ratio = 0.3
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 0
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 10
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform_hard21
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/random3.i)
# Using CappedMohrCoulomb with Mohr-Coulomb failure only
# Plasticity models:
# Cohesion = 1MPa
# Friction angle = dilation angle = 0.5
#
# Lame lambda = 1GPa. Lame mu = 1.3GPa
#
# A line of elements is perturbed randomly, and return to the yield surface at each quadpoint is checked
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1000
ny = 1234
nz = 1
xmin = 0
xmax = 1000
ymin = 0
ymax = 1234
zmin = 0
zmax = 1
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[ICs]
[./x]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_x
[../]
[./y]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_y
[../]
[./z]
type = RandomIC
min = -0.1
max = 0.1
variable = disp_z
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./f3]
order = CONSTANT
family = MONOMIAL
[../]
[./f4]
order = CONSTANT
family = MONOMIAL
[../]
[./f5]
order = CONSTANT
family = MONOMIAL
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 6
variable = f0
[../]
[./f1]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 7
variable = f1
[../]
[./f2]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 8
variable = f2
[../]
[./f3]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 9
variable = f3
[../]
[./f4]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 10
variable = f4
[../]
[./f5]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 11
variable = f5
[../]
[./int0]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = int0
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./tot_iters]
type = ElementIntegralMaterialProperty
mat_prop = plastic_NR_iterations
outputs = console
[../]
[./intnl_max]
type = ElementExtremeValue
variable = int0
outputs = console
[../]
[./raw_f0]
type = ElementExtremeValue
variable = f0
outputs = console
[../]
[./raw_f1]
type = ElementExtremeValue
variable = f1
outputs = console
[../]
[./raw_f2]
type = ElementExtremeValue
variable = f2
outputs = console
[../]
[./raw_f3]
type = ElementExtremeValue
variable = f3
outputs = console
[../]
[./raw_f4]
type = ElementExtremeValue
variable = f4
outputs = console
[../]
[./raw_f5]
type = ElementExtremeValue
variable = f5
outputs = console
[../]
[./iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./f0]
type = FunctionValuePostprocessor
function = should_be_zero0_fcn
[../]
[./f1]
type = FunctionValuePostprocessor
function = should_be_zero1_fcn
[../]
[./f2]
type = FunctionValuePostprocessor
function = should_be_zero2_fcn
[../]
[./f3]
type = FunctionValuePostprocessor
function = should_be_zero3_fcn
[../]
[./f4]
type = FunctionValuePostprocessor
function = should_be_zero4_fcn
[../]
[./f5]
type = FunctionValuePostprocessor
function = should_be_zero5_fcn
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f0'
[../]
[./should_be_zero1_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f1'
[../]
[./should_be_zero2_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f2'
[../]
[./should_be_zero3_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f3'
[../]
[./should_be_zero4_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f4'
[../]
[./should_be_zero5_fcn]
type = ParsedFunction
value = 'if(a<1E-1,0,a)'
vars = 'a'
vals = 'raw_f5'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E12
[../]
[./coh]
type = TensorMechanicsHardeningCubic
value_0 = 1E6
value_residual = 0
internal_limit = 1
[../]
[./ang]
type = TensorMechanicsHardeningCubic
value_0 = 0.9
value_residual = 0.2
internal_limit = 1
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 1E5
max_NR_iterations = 100
yield_function_tol = 1.0E-1
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = random3
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform11.i)
# Using CappedMohrCoulomb with compressive failure only
# checking for small deformation
# A single element is stretched by -1E-6m in z direction, and by small amounts in x and y directions
# stress_zz = Youngs Modulus*Strain = -2E6*1E-6 = -2 Pa
# compressive_strength is set to 1Pa
# Then the final stress should return to the yeild surface and the minimum principal stress value should be -1pa.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-0.1E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '-0.2E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-1E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform11
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update21.i)
# MC update version, with only MohrCoulomb, cohesion=10, friction angle = 60, psi = 5, smoothing_tol = 1
# Lame lambda = 0.5. Lame mu = 1
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 60
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 0.5
shear_modulus = 1.0
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '3 0 0 0 3 0 0 0 1.5'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update16.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to the plane of compressive yield
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '1 -0.1 -0.2 -0.1 -15 0.3 -0.2 0.3 0'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard22.i)
# Mohr-Coulomb only
# apply stretches in x direction and smaller stretches in the y direction
# to observe return to the MC plane
# This tests uses hardening of the friction and dilation angles. The returned configuration
# should obey
# 0 = 0.5 * (Smax - Smin) + 0.5 * (Smax + Smin) * sin(phi) - C cos(phi)
# which allows inference of phi.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.4E-6*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.17E-6*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl_tensile]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[./intnl_tensile]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl_tensile
[../]
[]
[Postprocessors]
[./s_max]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_mid]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_min]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[./intnl_tensile]
type = PointValue
point = '0 0 0'
variable = intnl_tensile
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./mc_phi]
type = TensorMechanicsHardeningCubic
value_residual = 0.524 # 30deg
value_0 = 0.174 # 10deg
internal_limit = 4E-6
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1E7
poissons_ratio = 0.0
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_phi
smoothing_tol = 0
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 9
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform_hard22
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform18.i)
# Using CappedMohrCoulomb with compressive failure only
# A single unit element is stretched by -1E-6m in z direction.
# with Lame lambda = 0.6E6 and Lame mu (shear) = 1E6
# stress_zz = -2.6 Pa
# stress_xx = -0.6 Pa
# stress_yy = -0.6 Pa
# compressive_strength is set to 0.5Pa
#
# stress_zz = -0.5
# plastic multiplier = 2.1/2.6 E-6
# stress_xx = -0.6 - (2.1/2.6*-0.6) = -0.115
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-1.0E-6*z'
[../]
[]
[AuxVariables]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./f1_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 1
variable = f1
[../]
[./f2_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 2
variable = f2
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f0]
type = PointValue
point = '0 0 0'
variable = f0
[../]
[./f1]
type = PointValue
point = '0 0 0'
variable = f1
[../]
[./f2]
type = PointValue
point = '0 0 0'
variable = f2
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0.6E6 1E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform18
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform2.i)
# Using CappedMohrCoulomb with tensile failure only
# checking for small deformation
# A single element is stretched equally in all directions.
# This causes the return direction to be along the sigma_I = sigma_II = sigma_III line
# tensile_strength is set to 1Pa, and smoothing_tol = 0.1Pa
# The smoothed yield function comes from two smoothing operations.
# The first is on sigma_I and sigma_II (sigma_I >= sigma_II >= sigma_III):
# yf = sigma_I + ismoother(0) - tensile_strength
# = sigma_I + (0.5 * smoothing_tol - smoothing_tol / Pi) - tensile_strength
# = sigma_I + 0.018169 - 1
# The second has the argument of ismoother equal to -0.018169.
# ismoother(-0.018169) = 0.5 * (-0.018169 + 0.1) - 0.1 * cos (0.5 * Pi * -0.018169 / 0.1) / Pi
# = 0.010372
# So the final yield function is
# yf = sigma_I + 0.018169 + 0.010372 - 1 = sigma_I + 0.028541 - 1
# However, because of the asymmetry in smoothing (the yield function is obtained
# by first smoothing sigma_I-ts and sigma_II-ts, and then by smoothing this
# result with sigma_III-ts) the result is sigma_I = sigma_II > sigma_III
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
strain = finite
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '1E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '1E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform2
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform7.i)
# Using CappedMohrCoulomb with tensile failure only
# A single element is incrementally stretched in the in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = sigma_II
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
strain = finite
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '4*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '1*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '4*z*t'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform7
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform1.i)
# Using CappedMohrCoulomb with tensile failure only
# checking for small deformation
# A single element is stretched by 1E-6m in z direction, and by small amounts in x and y directions
# stress_zz = Youngs Modulus*Strain = 2E6*1E-6 = 2 Pa
# tensile_strength is set to 1Pa
# Then the final stress should return to the yeild surface and the minimum principal stress value should be 1pa.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.1E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.2E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform1
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update11.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_min = 1 plane
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 0 0 0 0 0 0 0 -2'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard21.i)
# Mohr-Coulomb only
# apply stretches in x direction and smaller stretches in the y direction
# to observe return to the MC plane
# This tests uses hardening of the cohesion. The returned configuration
# should obey
# 0 = 0.5 * (Smax - Smin) + 0.5 * (Smax + Smin) * sin(phi) - C cos(phi)
# which allows inference of C.
# The tensile internal parameter is recorded, to check that it is zero
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0.4E-6*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0.1E-6*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl_tensile]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[./intnl_tensile]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl_tensile
[../]
[]
[Postprocessors]
[./s_max]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_mid]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_min]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[./intnl_tensile]
type = PointValue
point = '0 0 0'
variable = intnl_tensile
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningCubic
value_0 = 10
value_residual = 20
internal_limit = 5E-6
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1E7
poissons_ratio = 0.3
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 0
yield_function_tol = 1.0E-9
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 10
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform_hard21
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform13.i)
# Using CappedMohrCoulomb with compressive failure only
# checking for small deformation
# A single element is compressed by "ep" in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = sigma_II
# where sigma_I = (E_2222 + E_2200) * ep
# compressive_strength is set to 1Pa, smoothing_tol = 0.1Pa
# The smoothed yield function is
# yf = -sigma_I + ismoother(0) - compressive_strength
# = -sigma_I + (0.5 * smoothing_tol - smoothing_tol / Pi) - compressive_strength
# = -sigma_I - 0.98183
#
# With zero Poisson's ratio, the return stress will be
# stress_00 = stress_22 = 0.98183
# with all other stress components being zero
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-0.25E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-0.25E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_xx]
type = PointValue
point = '0 0 0'
variable = stress_xx
[../]
[./s_xy]
type = PointValue
point = '0 0 0'
variable = stress_xy
[../]
[./s_xz]
type = PointValue
point = '0 0 0'
variable = stress_xz
[../]
[./s_yy]
type = PointValue
point = '0 0 0'
variable = stress_yy
[../]
[./s_yz]
type = PointValue
point = '0 0 0'
variable = stress_yz
[../]
[./s_zz]
type = PointValue
point = '0 0 0'
variable = stress_zz
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform13
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update7.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to close to the edge of tensile yield
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-1 0.1 0.2 0.1 15 -0.3 0.2 -0.3 14'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform25.i)
# Mohr-Coulomb only
# apply equal stretches in x, y and z directions, to observe return to the MC tip
# Because of smoothing, the expected result is around
# Smax = Smid = Smin = 12.9
# The result is not exact because the smoothing is assymetrical.
# This test also employs a very small dilation angle, which makes return
# to the tip quite numerically difficult, so max_NR_iterations has been increased to 100
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '1E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '1E-6*y'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-6*z'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
index = 6
property = plastic_yield_function
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 0
variable = intnl
[../]
[]
[Postprocessors]
[./s_max]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_mid]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_min]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./mc_coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./mc_phi]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[./mc_psi]
type = TensorMechanicsHardeningConstant
value = 1E-4
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
youngs_modulus = 1E7
poissons_ratio = 0.3
[../]
[./mc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = ts
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
smoothing_tol = 5
yield_function_tol = 1.0E-9
max_NR_iterations = 100
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = mc
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform25
csv = true
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform16.i)
# Using CappedMohrCoulomb with compressive failure only
# A single element is incrementally compressed in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = sigma_II
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-1*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '-0.4*y*t'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-0.4*z*t'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 3
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform16
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update22.i)
# MC update version, with only MohrCoulomb, cohesion=10, friction angle = 60, psi = 5, smoothing_tol = 1
# Lame lambda = 0.5. Lame mu = 1
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 10
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 60
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 0.5
shear_modulus = 1.0
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '6 5 4 5 7 2 4 2 2'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform15.i)
# Using CappedMohrCoulomb with compressive failure only
# A single element is incrementally compressed in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = 0
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '-2*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-0.5*z*(t+1.5*t*t)'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 3
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform15
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update14.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-2 1 -0.5 -1 -1.9 0 -0.5 0 -3'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update34.i)
# MC update version, with only MohrCoulomb, cohesion=40, friction angle = 35deg, psi = 5deg, smoothing_tol = 0.5
# Compressive strength = 1MPa
# Lame lambda = 1E3. Lame mu = 1.3E3
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E2
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 4E1
[../]
[./phi]
type = TensorMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./psi]
type = TensorMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-100.1 -0.1 0.2 -0.1 -0.9 0 0.2 0 -1.1'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = phi
dilation_angle = psi
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update13.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Return to the stress_I = stress_II = stress_III ~1 tip
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-2 0 0 0 -1.9 0 0 0 -2.1'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update5.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
# Returns to close to the tip of the yield function.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0.5
internal_limit = 2E-2
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '15 1 0.2 1 10 -0.3 -0.3 0.2 8'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update8.i)
# MC update version, with only Tensile with tensile strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0
internal_limit = 2E-3
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '2 -1 0.5 1 1.9 0 0.5 0 3'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform_hard13.i)
# Using CappedMohrCoulomb with compressive failure only
# checking for small deformation, with cubic hardening
# A single element is repeatedly compressed in z direction
# compressive_strength is set to 0.9Pa, compressive_strength_residual = 0.5Pa, and limit value = 1E-5
# This allows the hardening of the compressive strength to be observed
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '0'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '-0.5E-6*z*t'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[./intnl]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 3
variable = yield_fcn
[../]
[./iter_auxk]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[./intnl_auxk]
type = MaterialStdVectorAux
property = plastic_internal_parameter
index = 1
variable = intnl
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 0.9
value_residual = 0.5
internal_0 = -1E-5
internal_limit = 0
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./compressive]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.0
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = compressive
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 10
dt = 1.0
type = Transient
[]
[Outputs]
file_base = small_deform_hard13
csv = true
[]
(modules/tensor_mechanics/test/tests/jacobian/mc_update18.i)
# MC update version, with only Compressive with compressive strength = 1MPa and smoothing_tol = 0.1E5
# Lame lambda = 1GPa. Lame mu = 1.3GPa
# Units in this file are MPa (not Pa)
#
# Start from non-diagonal stress state with softening.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[./TensorMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./cs]
type = TensorMechanicsHardeningCubic
value_0 = 1
value_residual = 0
internal_limit = 2E-3
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 30
convert_to_radians = true
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeIsotropicElasticityTensor
lambda = 1.0E3
shear_modulus = 1.3E3
[../]
[./strain]
type = ComputeIncrementalSmallStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '-2 1 -0.5 -1 -1.9 0 -0.5 0 -3'
eigenstrain_name = ini_stress
[../]
[./cmc]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.1
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = cmc
perform_finite_strain_rotations = false
[../]
[]
[Preconditioning]
[./andy]
type = SMP
full = true
petsc_options_iname = '-snes_type'
petsc_options_value = 'test'
[../]
[]
[Executioner]
type = Transient
solve_type = Newton
[]
(modules/tensor_mechanics/test/tests/capped_mohr_coulomb/small_deform5.i)
# Using CappedMohrCoulomb with tensile failure only
# A single element is incrementally stretched in the in the z and x directions
# This causes the return direction to be along the hypersurface sigma_III = 0
# and the resulting stresses are checked to lie on the expected yield surface
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1
ny = 1
nz = 1
xmin = -0.5
xmax = 0.5
ymin = -0.5
ymax = 0.5
zmin = -0.5
zmax = 0.5
[]
[GlobalParams]
displacements = 'disp_x disp_y disp_z'
[]
[Modules/TensorMechanics/Master]
[./all]
add_variables = true
strain = finite
incremental = true
generate_output = 'max_principal_stress mid_principal_stress min_principal_stress stress_xx stress_xy stress_xz stress_yy stress_yz stress_zz'
[../]
[]
[BCs]
[./x]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front back'
function = '4*x*t'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = 'z*(t-0.5)'
[../]
[]
[AuxVariables]
[./stress_xx]
order = CONSTANT
family = MONOMIAL
[../]
[./stress_xy]
order = CONSTANT
family = MONOMIAL
[../]
[./stress_xz]
order = CONSTANT
family = MONOMIAL
[../]
[./stress_yy]
order = CONSTANT
family = MONOMIAL
[../]
[./stress_yz]
order = CONSTANT
family = MONOMIAL
[../]
[./stress_zz]
order = CONSTANT
family = MONOMIAL
[../]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./stress_xx]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_xx
index_i = 0
index_j = 0
[../]
[./stress_xy]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_xy
index_i = 0
index_j = 1
[../]
[./stress_xz]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_xz
index_i = 0
index_j = 2
[../]
[./stress_yy]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_yy
index_i = 1
index_j = 1
[../]
[./stress_yz]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_yz
index_i = 1
index_j = 2
[../]
[./stress_zz]
type = RankTwoAux
rank_two_tensor = stress
variable = stress_zz
index_i = 2
index_j = 2
[../]
[./yield_fcn_auxk]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = yield_fcn
[../]
[]
[Postprocessors]
[./s_I]
type = PointValue
point = '0 0 0'
variable = max_principal_stress
[../]
[./s_II]
type = PointValue
point = '0 0 0'
variable = mid_principal_stress
[../]
[./s_III]
type = PointValue
point = '0 0 0'
variable = min_principal_stress
[../]
[./f]
type = PointValue
point = '0 0 0'
variable = yield_fcn
[../]
[]
[UserObjects]
[./ts]
type = TensorMechanicsHardeningConstant
value = 1
[../]
[./cs]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./coh]
type = TensorMechanicsHardeningConstant
value = 1E6
[../]
[./ang]
type = TensorMechanicsHardeningConstant
value = 0.5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 2.0'
[../]
[./tensile]
type = CappedMohrCoulombStressUpdate
tensile_strength = ts
compressive_strength = cs
cohesion = coh
friction_angle = ang
dilation_angle = ang
smoothing_tol = 0.5
yield_function_tol = 1.0E-12
[../]
[./stress]
type = ComputeMultipleInelasticStress
inelastic_models = tensile
perform_finite_strain_rotations = false
[../]
[]
[Executioner]
end_time = 1
dt = 0.1
type = Transient
[]
[Outputs]
file_base = small_deform5
csv = true
[]
(modules/tensor_mechanics/include/materials/CappedMohrCoulombCosseratStressUpdate.h)
// This file is part of the MOOSE framework
// https://www.mooseframework.org
//
// All rights reserved, see COPYRIGHT for full restrictions
// https://github.com/idaholab/moose/blob/master/COPYRIGHT
//
// Licensed under LGPL 2.1, please see LICENSE for details
// https://www.gnu.org/licenses/lgpl-2.1.html
#pragma once
#include "CappedMohrCoulombStressUpdate.h"
/**
* CappedMohrCoulombCosseratStressUpdate implements rate-independent nonassociative
* Mohr-Coulomb plus tensile plus compressive plasticity with hardening/softening
* in the Cosserat setting. The Mohr-Coulomb plasticity considers the symmetric
* part of the stress tensor only, and uses an isotropic elasticity tensor that
* is input by the user (the anti-symmetric parts of the stress tensor and the
* moment-stress tensor are not included in this plastic model, and any non-isometric
* parts of the elasticity tensor are ignored in the flow rule).
*/
class CappedMohrCoulombCosseratStressUpdate : public CappedMohrCoulombStressUpdate
{
public:
static InputParameters validParams();
CappedMohrCoulombCosseratStressUpdate(const InputParameters & parameters);
/**
* The full elasticity tensor may be anisotropic, and usually is in the case
* of layered Cosserat. However, this class only uses the isotropic parts of
* it (corresponding to the "host" material) that are encoded in _host_young
* and _host_poisson
*/
bool requiresIsotropicTensor() override { return false; }
protected:
/// Young's modulus of the host material
const Real _host_young;
/// Poisson's of the host material
const Real _host_poisson;
/// E0011 = Lame lambda modulus of the host material
const Real _host_E0011;
/// E0000 = Lame lambda + 2 * shear modulus of the host material
const Real _host_E0000;
virtual void setStressAfterReturnV(const RankTwoTensor & stress_trial,
const std::vector<Real> & stress_params,
Real gaE,
const std::vector<Real> & intnl,
const yieldAndFlow & smoothed_q,
const RankFourTensor & Eijkl,
RankTwoTensor & stress) const override;
virtual void preReturnMapV(const std::vector<Real> & trial_stress_params,
const RankTwoTensor & stress_trial,
const std::vector<Real> & intnl_old,
const std::vector<Real> & yf,
const RankFourTensor & Eijkl) override;
void setEffectiveElasticity(const RankFourTensor & Eijkl) override;
virtual void consistentTangentOperatorV(const RankTwoTensor & stress_trial,
const std::vector<Real> & trial_stress_params,
const RankTwoTensor & stress,
const std::vector<Real> & stress_params,
Real gaE,
const yieldAndFlow & smoothed_q,
const RankFourTensor & Eijkl,
bool compute_full_tangent_operator,
const std::vector<std::vector<Real>> & dvar_dtrial,
RankFourTensor & cto) override;
};