- internal_constraint_toleranceThe Newton-Raphson process is only deemed converged if the internal constraint is less than this.
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:The Newton-Raphson process is only deemed converged if the internal constraint is less than this.
- tensile_strengthA SolidMechanicsHardening UserObject that defines hardening of the tensile strength
C++ Type:UserObjectName
Unit:(no unit assumed)
Controllable:No
Description:A SolidMechanicsHardening UserObject that defines hardening of the tensile strength
- tensile_tip_smootherFor the 'hyperbolic' tip_scheme, the pyramid vertex will be smoothed by the given amount. For the 'cap' tip_scheme, additional smoothing will occur. Typical value is 0.1*tensile_strength
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:For the 'hyperbolic' tip_scheme, the pyramid vertex will be smoothed by the given amount. For the 'cap' tip_scheme, additional smoothing will occur. Typical value is 0.1*tensile_strength
- yield_function_toleranceIf the yield function is less than this amount, the (stress, internal parameter) are deemed admissible.
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:If the yield function is less than this amount, the (stress, internal parameter) are deemed admissible.
SolidMechanicsPlasticTensile
buildconstruction:Undocumented Class
The SolidMechanicsPlasticTensile 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.
Associative tensile plasticity with hardening/softening, and tensile_strength = 1
Overview
Example Input File Syntax
Input Parameters
- cap_rate0For the 'cap' tip_scheme, this controls how quickly the cap degenerates to a hemisphere: small values mean a slow degeneration to a hemisphere (and zero means the 'cap' will be totally inactive). Typical value is 1/tensile_strength
Default:0
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:For the 'cap' tip_scheme, this controls how quickly the cap degenerates to a hemisphere: small values mean a slow degeneration to a hemisphere (and zero means the 'cap' will be totally inactive). Typical value is 1/tensile_strength
- cap_start0For the 'cap' tip_scheme, smoothing is performed in the stress_mean > cap_start region
Default:0
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:For the 'cap' tip_scheme, smoothing is performed in the stress_mean > cap_start region
- execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Unit:(no unit assumed)
Options:XFEM_MARK, FORWARD, ADJOINT, HOMOGENEOUS_FORWARD, ADJOINT_TIMESTEP_BEGIN, ADJOINT_TIMESTEP_END, NONE, INITIAL, LINEAR, NONLINEAR_CONVERGENCE, NONLINEAR, POSTCHECK, TIMESTEP_END, TIMESTEP_BEGIN, MULTIAPP_FIXED_POINT_END, MULTIAPP_FIXED_POINT_BEGIN, FINAL, CUSTOM
Controllable:No
Description:The list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
- 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
Unit:(no unit assumed)
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.
- tensile_edge_smoother25Smoothing parameter: the edges of the cone are smoothed by the given amount.
Default:25
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:Smoothing parameter: the edges of the cone are smoothed by the given amount.
- tensile_lode_cutoffIf the second invariant of stress is less than this amount, the Lode angle is assumed to be zero. This is to guard against precision-loss problems, and this parameter should be set small. Default = 0.00001*((yield_Function_tolerance)^2)
C++ Type:double
Unit:(no unit assumed)
Controllable:No
Description:If the second invariant of stress is less than this amount, the Lode angle is assumed to be zero. This is to guard against precision-loss problems, and this parameter should be set small. Default = 0.00001*((yield_Function_tolerance)^2)
- tip_schemehyperbolicScheme by which the pyramid's tip will be smoothed.
Default:hyperbolic
C++ Type:MooseEnum
Unit:(no unit assumed)
Options:hyperbolic, cap
Controllable:No
Description:Scheme by which the pyramid's tip will be smoothed.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Optional Parameters
- allow_duplicate_execution_on_initialFalseIn the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:In the case where this UserObject is depended upon by an initial condition, allow it to be executed twice during the initial setup (once before the IC and again after mesh adaptivity (if applicable).
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Unit:(no unit assumed)
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
Unit:(no unit assumed)
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
Default:0
C++ Type:int
Unit:(no unit assumed)
Controllable:No
Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
- force_postauxFalseForces the UserObject to be executed in POSTAUX
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in POSTAUX
- force_preauxFalseForces the UserObject to be executed in PREAUX
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in PREAUX
- force_preicFalseForces the UserObject to be executed in PREIC during initial setup
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in PREIC during initial setup
- 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
Unit:(no unit assumed)
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
Input Files
- (modules/solid_mechanics/test/tests/tensile/small_deform2.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform5.i)
- (modules/solid_mechanics/test/tests/tensile/random_smoothed.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform3.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform_hard3.i)
- (modules/solid_mechanics/test/tests/multi/rock1.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform6.i)
- (modules/solid_mechanics/test/tests/multi/special_rock1.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform1.i)
- (modules/solid_mechanics/test/tests/initial_stress/mc_tensile.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform4.i)
- (modules/solid_mechanics/test/tests/tensile/small_deform7.i)
- (modules/solid_mechanics/test/tests/multi/paper3.i)
(modules/solid_mechanics/test/tests/tensile/small_deform2.i)
# checking for small deformation
# A single element is stretched by 1E-6m in all directions.
# tensile_strength is set to 1Pa, and smoother = 0.5
# Then the final stress should return to the yield surface and all principal stresses should be 0.5
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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 = '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_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 = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.5
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform2
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform5.i)
# checking for small deformation
# 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
#
# tensile_strength is set to 1Pa, tip_smoother = 0.5, edge_smoother = 25degrees
# Then A + B + C = 0.609965
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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 = '0.25E-6*x*t*t'
[../]
[./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*t*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_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 = SolidMechanicsHardeningCubic
value_0 = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.5
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 10
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform5
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/random_smoothed.i)
# Plasticity models:
# Smoothed tensile with 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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
order = CONSTANT
family = MONOMIAL
[../]
[]
[AuxKernels]
[./f0]
type = MaterialStdVectorAux
property = plastic_yield_function
index = 0
variable = f0
[../]
[./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
[../]
[./iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./f0]
type = FunctionValuePostprocessor
function = should_be_zero0_fcn
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
expression = 'if(a<1E-1,0,a)'
symbol_names = 'a'
symbol_values = 'raw_f0'
[../]
[]
[UserObjects]
[./ts]
type = SolidMechanicsHardeningConstant
value = 1E6
[../]
[./tensile]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
tensile_tip_smoother = 1E5
yield_function_tolerance = 1.0E-1
internal_constraint_tolerance = 1.0E-7
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./multi]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-7
plastic_models = 'tensile'
max_NR_iterations = 20
min_stepsize = 1E-4
max_stepsize_for_dumb = 1E-3
debug_fspb = crash
debug_jac_at_stress = '10 0 0 0 10 0 0 0 10'
debug_jac_at_pm = '1 1 1 1'
debug_jac_at_intnl = '1 1 1 1'
debug_stress_change = 1E1
debug_pm_change = '1E-6 1E-6 1E-6 1E-6'
debug_intnl_change = '1E-6 1E-6 1E-6 1E-6'
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = random_smoothed
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform3.i)
# 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
# tensile_strength is set to 1Pa, tip_smoother = 0, edge_smoother = 25degrees
# Then A + B + C = 0.609965
#
# The trial stress is (la, 0, la), with mean stress 2la/3, and bar(sigma)=sqrt(secondInvariant)=la/sqrt(3)
# If this sits on the yield surface then
# 2la/3 + la*K/sqrt(3) - 1 = 0
# So la = 0.9815. Therefore, with young's modulus = 2MPa, we need "ep" = 0.9815/4. I set
# "ep" = 0.25 and observe a tiny amount of yielding
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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 = '0.25E-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 = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.0
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform3
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform_hard3.i)
# checking for small deformation, with cubic hardening
# A single element is repeatedly stretched by 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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '1E-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 = 0
variable = intnl
[../]
[]
[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
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[./intnl]
type = PointValue
point = '0 0 0'
variable = intnl
[../]
[]
[UserObjects]
[./ts]
type = SolidMechanicsHardeningCubic
value_0 = 1.0
value_residual = 0.5
internal_0 = 0
internal_limit = 1E-5
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.0
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
debug_jac_at_stress = '1 2 3 2 -4 -5 3 -5 10'
debug_jac_at_pm = 0.8
debug_jac_at_intnl = 1
debug_stress_change = 1E-8
debug_pm_change = 1E-5
debug_intnl_change = 1E-5
[../]
[]
[Executioner]
end_time = 10
dt = 1.0
type = Transient
[]
[Outputs]
file_base = small_deform_hard3
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/multi/rock1.i)
# Plasticity models:
# Mohr-Coulomb with cohesion = 40MPa, friction angle = 35deg, dilation angle = 10deg
# Tensile with strength = 1MPa
# WeakPlaneShear with cohesion = 1MPa, friction angle = 25deg, dilation angle = 25deg
# WeakPlaneTensile with strength = 0.01MPa
#
# 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
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[Kernels]
[SolidMechanics]
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]
[./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
[../]
[./f0]
order = CONSTANT
family = MONOMIAL
[../]
[./f1]
order = CONSTANT
family = MONOMIAL
[../]
[./f2]
order = CONSTANT
family = MONOMIAL
[../]
[./f3]
order = CONSTANT
family = MONOMIAL
[../]
[./int0]
order = CONSTANT
family = MONOMIAL
[../]
[./int1]
order = CONSTANT
family = MONOMIAL
[../]
[./int2]
order = CONSTANT
family = MONOMIAL
[../]
[./int3]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
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
[../]
[./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
[../]
[./int0]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 0
variable = int0
[../]
[./int1]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 1
variable = int1
[../]
[./int2]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 2
variable = int2
[../]
[./int3]
type = MaterialStdVectorAux
property = plastic_internal_parameter
factor = 1E6
index = 3
variable = int3
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./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
[../]
[./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
[../]
[]
[Functions]
[./should_be_zero0_fcn]
type = ParsedFunction
expression = 'if(a<1E-1,0,a)'
symbol_names = 'a'
symbol_values = 'raw_f0'
[../]
[./should_be_zero1_fcn]
type = ParsedFunction
expression = 'if(a<1E-1,0,a)'
symbol_names = 'a'
symbol_values = 'raw_f1'
[../]
[./should_be_zero2_fcn]
type = ParsedFunction
expression = 'if(a<1E-1,0,a)'
symbol_names = 'a'
symbol_values = 'raw_f2'
[../]
[./should_be_zero3_fcn]
type = ParsedFunction
expression = 'if(a<1E-1,0,a)'
symbol_names = 'a'
symbol_values = 'raw_f3'
[../]
[]
[UserObjects]
[./mc_coh]
type = SolidMechanicsHardeningConstant
value = 4E7
[../]
[./mc_phi]
type = SolidMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./mc_psi]
type = SolidMechanicsHardeningConstant
value = 10
convert_to_radians = true
[../]
[./mc]
type = SolidMechanicsPlasticMohrCoulomb
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
mc_tip_smoother = 4E6
yield_function_tolerance = 1.0E-1
internal_constraint_tolerance = 1.0E-7
[../]
[./ts]
type = SolidMechanicsHardeningConstant
value = 1E6
[../]
[./tensile]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
tensile_tip_smoother = 1E5
yield_function_tolerance = 1.0E-1
internal_constraint_tolerance = 1.0E-7
[../]
[./coh]
type = SolidMechanicsHardeningConstant
value = 1E6
[../]
[./tanphi]
type = SolidMechanicsHardeningConstant
value = 0.46630766
[../]
[./tanpsi]
type = SolidMechanicsHardeningConstant
value = 0.46630766
[../]
[./wps]
type = SolidMechanicsPlasticWeakPlaneShear
cohesion = coh
tan_friction_angle = tanphi
tan_dilation_angle = tanpsi
smoother = 1E5
yield_function_tolerance = 1.0E-1
internal_constraint_tolerance = 1.0E-7
[../]
[./str]
type = SolidMechanicsHardeningConstant
value = 0.01E6
[../]
[./wpt]
type = SolidMechanicsPlasticWeakPlaneTensile
tensile_strength = str
yield_function_tolerance = 1.0E-1
internal_constraint_tolerance = 1.0E-7
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '1E9 1.3E9'
[../]
[./strain]
type = ComputeFiniteStrain
block = 0
displacements = 'disp_x disp_y disp_z'
[../]
[./multi]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-7
plastic_models = 'mc tensile wps wpt'
deactivation_scheme = 'optimized_to_safe_to_dumb'
max_NR_iterations = 20
min_stepsize = 1E-4
max_stepsize_for_dumb = 1E-3
debug_fspb = crash
debug_jac_at_stress = '10 0 0 0 10 0 0 0 10'
debug_jac_at_pm = '1 1 1 1'
debug_jac_at_intnl = '1 1 1 1'
debug_stress_change = 1E1
debug_pm_change = '1E-6 1E-6 1E-6 1E-6'
debug_intnl_change = '1E-6 1E-6 1E-6 1E-6'
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = rock1
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform6.i)
# checking for small deformation
# 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
#
# tensile_strength is set to 1Pa, tip_smoother = 0.5
# Lode angle = -30degrees
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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'
[../]
[./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*t*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_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 = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.5
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 10
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform6
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/multi/special_rock1.i)
# Plasticity models:
# Mohr-Coulomb with cohesion = 40MPa, friction angle = 35deg, dilation angle = 5deg
# Tensile with 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
#
# NOTE: The yield function tolerances here are set at 100-times what i would usually use
# This is because otherwise the test fails on the 'pearcey' architecture.
# This is because identical stress tensors yield slightly different eigenvalues
# (and hence return-map residuals) on 'pearcey' than elsewhere, which results in
# a different number of NR iterations are needed to return to the yield surface.
# This is presumably because of compiler internals, or the BLAS routines being
# optimised differently or something similar.
[Mesh]
type = GeneratedMesh
dim = 3
nx = 1000
ny = 125
nz = 1
xmin = 0
xmax = 1000
ymin = 0
ymax = 125
zmin = 0
zmax = 1
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[GlobalParams]
volumetric_locking_correction=true
[]
[Kernels]
[SolidMechanics]
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]
[./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
[../]
[./linesearch]
order = CONSTANT
family = MONOMIAL
[../]
[./ld]
order = CONSTANT
family = MONOMIAL
[../]
[./constr_added]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
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
[../]
[./linesearch]
type = MaterialRealAux
property = plastic_linesearch_needed
variable = linesearch
[../]
[./ld]
type = MaterialRealAux
property = plastic_linear_dependence_encountered
variable = ld
[../]
[./constr_added]
type = MaterialRealAux
property = plastic_constraints_added
variable = constr_added
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./max_iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./av_linesearch]
type = ElementAverageValue
variable = linesearch
outputs = 'console csv'
[../]
[./av_ld]
type = ElementAverageValue
variable = ld
outputs = 'console csv'
[../]
[./av_constr_added]
type = ElementAverageValue
variable = constr_added
outputs = 'console csv'
[../]
[./av_iter]
type = ElementAverageValue
variable = iter
outputs = 'console csv'
[../]
[]
[UserObjects]
[./mc_coh]
type = SolidMechanicsHardeningConstant
value = 4E7
[../]
[./mc_phi]
type = SolidMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./mc_psi]
type = SolidMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[./mc]
type = SolidMechanicsPlasticMohrCoulombMulti
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
use_custom_returnMap = false
yield_function_tolerance = 1.0E+2 # Note larger value
shift = 1.0E+2 # Note larger value
internal_constraint_tolerance = 1.0E-7
[../]
[./mc_smooth]
type = SolidMechanicsPlasticMohrCoulomb
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
mc_tip_smoother = 4E6
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[./ts]
type = SolidMechanicsHardeningConstant
value = 1E6
[../]
[./tensile]
type = SolidMechanicsPlasticTensileMulti
tensile_strength = ts
yield_function_tolerance = 1.0E+2 # Note larger value
shift = 1.0E+2 # Note larger value
internal_constraint_tolerance = 1.0E-7
use_custom_returnMap = false
use_custom_cto = false
[../]
[./tensile_smooth]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
tensile_tip_smoother = 1E5
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '1.0E9 1.3E9'
[../]
[./strain]
type = ComputeFiniteStrain
block = 0
displacements = 'disp_x disp_y disp_z'
[../]
[./multi]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5 # Note larger value, to match the larger yield_function_tolerances
plastic_models = 'tensile mc'
max_NR_iterations = 5
specialIC = 'rock'
deactivation_scheme = 'safe'
min_stepsize = 1
max_stepsize_for_dumb = 1
debug_fspb = crash
debug_jac_at_stress = '10 0 0 0 10 0 0 0 10'
debug_jac_at_pm = '1 1 1 1'
debug_jac_at_intnl = '1 1 1 1'
debug_stress_change = 1E1
debug_pm_change = '1E-6 1E-6 1E-6 1E-6'
debug_intnl_change = '1E-6 1E-6 1E-6 1E-6'
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = special_rock1
exodus = false
csv = true
[]
(modules/solid_mechanics/test/tests/tensile/small_deform1.i)
# 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 maximum 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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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 = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.0
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
debug_jac_at_stress = '1 2 3 2 -4 -5 3 -5 10'
debug_jac_at_pm = 0.8
debug_jac_at_intnl = 1
debug_stress_change = 1E-8
debug_pm_change = 1E-5
debug_intnl_change = 1E-5
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform1
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/initial_stress/mc_tensile.i)
# In this example, an initial stress is applied that
# is inadmissible, and the return-map algorithm must be
# used to return to the yield surface before any other
# computations can be carried out.
# In this case, the return-map algorithm must subdivide
# the initial stress, otherwise it does not converge.
# This test is testing that subdivision process.
[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]
[SolidMechanics]
displacements = 'disp_x disp_y disp_z'
[../]
[]
[BCs]
[./bottomx]
type = DirichletBC
variable = disp_x
boundary = 'back'
value = 0.0
[../]
[./bottomy]
type = DirichletBC
variable = disp_y
boundary = 'back'
value = 0.0
[../]
[./bottomz]
type = DirichletBC
variable = disp_z
boundary = 'back'
value = 0.0
[../]
[./topx]
type = FunctionDirichletBC
variable = disp_x
boundary = 'front'
function = '2*t-1'
[../]
[./topy]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front'
function = 't-1'
[../]
[./topz]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front'
function = 't-1'
[../]
[]
[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
[../]
[./iter]
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
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[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
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
outputs = console
[../]
[]
[UserObjects]
[./mc_coh]
type = SolidMechanicsHardeningConstant
value = 1E5
[../]
[./mc_phi]
type = SolidMechanicsHardeningConstant
value = 60
convert_to_radians = true
[../]
[./mc_psi]
type = SolidMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[./mc]
type = SolidMechanicsPlasticMohrCoulomb
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
mc_tip_smoother = 4.0
mc_edge_smoother = 25
yield_function_tolerance = 1E-3
internal_constraint_tolerance = 1E-9
[../]
[./str]
type = SolidMechanicsHardeningConstant
value = 1
[../]
[./pt]
type = SolidMechanicsPlasticTensile
tensile_strength = str
yield_function_tolerance = 1E-3
tensile_tip_smoother = 0.05
internal_constraint_tolerance = 1E-9
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
fill_method = symmetric_isotropic
C_ijkl = '0 1E7'
[../]
[./strain]
type = ComputeFiniteStrain
displacements = 'disp_x disp_y disp_z'
eigenstrain_names = ini_stress
[../]
[./ini_stress]
type = ComputeEigenstrainFromInitialStress
initial_stress = '8E6 4E6 -18E6 4E6 -40E6 -2E6 -18E6 -2E6 -34E6'
eigenstrain_name = ini_stress
[../]
[./mc]
type = ComputeMultiPlasticityStress
ep_plastic_tolerance = 1E-9
plastic_models = 'pt mc'
deactivation_scheme = safe
max_NR_iterations = 100
min_stepsize = 0.1
[../]
[]
[Executioner]
end_time = 2
dt = 1
type = Transient
[]
[Outputs]
file_base = mc_tensile
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform4.i)
# checking for small deformation
# A single element is stretched by 0.75E-6m in the z and x directions
# This causes the return direction to be along the hypersurface sigma_I = sigma_II
# tensile_strength is set to 1Pa, tip_smoother = 0, edge_smoother = 25degrees
# Then A + B + C = 0.609965
#
# The final stress should have meanstress = 0.680118 and bar(sigma) = 0.52443, and sigma_zz = sigma_xx = 0.982896
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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 = '0.75E-6*x'
[../]
[./y]
type = FunctionDirichletBC
variable = disp_y
boundary = 'front back'
function = '0'
[../]
[./z]
type = FunctionDirichletBC
variable = disp_z
boundary = 'front back'
function = '0.75E-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 = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tensile_tip_smoother = 0.0
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = small_deform4
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/tensile/small_deform7.i)
# checking for small deformation
# 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
#
# tensile_strength is set to 1Pa,
# cap smoothing is used with tip_smoother = 0.0, cap_start = 0.5, cap_rate = 2.0
# Lode angle = -30degrees
[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'
[]
[Physics/SolidMechanics/QuasiStatic]
[./all]
add_variables = true
incremental = true
strain = finite
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'
[../]
[./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*t*t'
[../]
[]
[AuxVariables]
[./yield_fcn]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
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
[../]
[]
[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
[../]
[./iter]
type = PointValue
point = '0 0 0'
variable = iter
[../]
[]
[UserObjects]
[./ts]
type = SolidMechanicsHardeningConstant
value = 1
[../]
[./mc]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
yield_function_tolerance = 1E-6
tip_scheme = cap
tensile_tip_smoother = 0.0
cap_start = -0.5
cap_rate = 2
internal_constraint_tolerance = 1E-5
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '0 2.0E6'
[../]
[./mc]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-5
max_NR_iterations = 1000
plastic_models = mc
debug_fspb = crash
[../]
[]
[Executioner]
end_time = 9
dt = 0.9
type = Transient
[]
[Outputs]
file_base = small_deform7
exodus = false
[./csv]
type = CSV
[../]
[]
(modules/solid_mechanics/test/tests/multi/paper3.i)
# This runs the third example models described in the 'MultiSurface' plasticity paper
# Just change the deactivation_scheme
#
# Plasticity models:
# Mohr-Coulomb with cohesion = 40MPa, friction angle = 35deg, dilation angle = 5deg
# Tensile with strength = 1MPa
# WeakPlaneTensile with strength = 1000Pa
# WeakPlaneShear with cohesion = 0.1MPa and friction angle = 25, dilation angle = 5deg
#
# Lame lambda = 1.2GPa. Lame mu = 1.2GPa (Young = 3GPa, poisson = 0.5)
#
# 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 = 125
nz = 1
xmin = 0
xmax = 1000
ymin = 0
ymax = 125
zmin = 0
zmax = 1
[]
[Variables]
[./disp_x]
[../]
[./disp_y]
[../]
[./disp_z]
[../]
[]
[GlobalParams]
volumetric_locking_correction=true
[]
[Kernels]
[SolidMechanics]
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]
[./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
[../]
[./linesearch]
order = CONSTANT
family = MONOMIAL
[../]
[./ld]
order = CONSTANT
family = MONOMIAL
[../]
[./constr_added]
order = CONSTANT
family = MONOMIAL
[../]
[./iter]
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
[../]
[./linesearch]
type = MaterialRealAux
property = plastic_linesearch_needed
variable = linesearch
[../]
[./ld]
type = MaterialRealAux
property = plastic_linear_dependence_encountered
variable = ld
[../]
[./constr_added]
type = MaterialRealAux
property = plastic_constraints_added
variable = constr_added
[../]
[./iter]
type = MaterialRealAux
property = plastic_NR_iterations
variable = iter
[../]
[]
[Postprocessors]
[./max_iter]
type = ElementExtremeValue
variable = iter
outputs = console
[../]
[./av_iter]
type = ElementAverageValue
variable = iter
outputs = 'console csv'
[../]
[./av_linesearch]
type = ElementAverageValue
variable = linesearch
outputs = 'console csv'
[../]
[./av_ld]
type = ElementAverageValue
variable = ld
outputs = 'console csv'
[../]
[./av_constr_added]
type = ElementAverageValue
variable = constr_added
outputs = 'console csv'
[../]
[]
[UserObjects]
[./mc_coh]
type = SolidMechanicsHardeningConstant
value = 4E7
[../]
[./mc_phi]
type = SolidMechanicsHardeningConstant
value = 35
convert_to_radians = true
[../]
[./mc_psi]
type = SolidMechanicsHardeningConstant
value = 5
convert_to_radians = true
[../]
[./mc]
type = SolidMechanicsPlasticMohrCoulombMulti
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
yield_function_tolerance = 1.0
shift = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[./mc_smooth]
type = SolidMechanicsPlasticMohrCoulomb
cohesion = mc_coh
friction_angle = mc_phi
dilation_angle = mc_psi
mc_tip_smoother = 4E6
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[./ts]
type = SolidMechanicsHardeningConstant
value = 1E6
[../]
[./tensile]
type = SolidMechanicsPlasticTensileMulti
tensile_strength = ts
yield_function_tolerance = 1.0
shift = 1.0
internal_constraint_tolerance = 1.0E-7
use_custom_returnMap = false
use_custom_cto = false
[../]
[./tensile_smooth]
type = SolidMechanicsPlasticTensile
tensile_strength = ts
tensile_tip_smoother = 1E5
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[./wpt_str]
type = SolidMechanicsHardeningConstant
value = 1.0E3
[../]
[./wpt]
type = SolidMechanicsPlasticWeakPlaneTensile
tensile_strength = wpt_str
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[./wps_c]
type = SolidMechanicsHardeningConstant
value = 1.0E5
[../]
[./wps_tan_phi]
type = SolidMechanicsHardeningConstant
value = 0.466
[../]
[./wps_tan_psi]
type = SolidMechanicsHardeningConstant
value = 0.087
[../]
[./wps]
type = SolidMechanicsPlasticWeakPlaneShear
cohesion = wps_c
tan_friction_angle = wps_tan_phi
tan_dilation_angle = wps_tan_psi
smoother = 1.0E4
yield_function_tolerance = 1.0
internal_constraint_tolerance = 1.0E-7
[../]
[]
[Materials]
[./elasticity_tensor]
type = ComputeElasticityTensor
block = 0
fill_method = symmetric_isotropic
C_ijkl = '1.2E9 1.2E9'
[../]
[./strain]
type = ComputeFiniteStrain
block = 0
displacements = 'disp_x disp_y disp_z'
[../]
[./multi]
type = ComputeMultiPlasticityStress
block = 0
ep_plastic_tolerance = 1E-7
plastic_models = 'tensile_smooth mc_smooth wpt wps'
max_NR_iterations = 30
specialIC = 'none'
deactivation_scheme = 'optimized'
min_stepsize = 1E-6
max_stepsize_for_dumb = 1E-2
debug_fspb = crash
debug_jac_at_stress = '10 0 0 0 10 0 0 0 10'
debug_jac_at_pm = '1 1 1 1'
debug_jac_at_intnl = '1 1 1 1'
debug_stress_change = 1E1
debug_pm_change = '1E-6 1E-6 1E-6 1E-6'
debug_intnl_change = '1E-6 1E-6 1E-6 1E-6'
[../]
[]
[Executioner]
end_time = 1
dt = 1
type = Transient
[]
[Outputs]
file_base = paper3
exodus = false
csv = true
[]