SlaveConstraint

under construction:Undocumented Class

The SlaveConstraint 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.


# SlaveConstraint

!syntax description /DiracKernels/SlaveConstraint

## Overview

!! Replace these lines with information regarding the SlaveConstraint object.

## Example Input File Syntax

!! Describe and include an example of how to use the SlaveConstraint object.

!syntax parameters /DiracKernels/SlaveConstraint

!syntax inputs /DiracKernels/SlaveConstraint

!syntax children /DiracKernels/SlaveConstraint

!syntax description /DiracKernels/SlaveConstraint

Input Parameters

boundaryThe slave boundary
C++ Type:BoundaryName
Options:
Description:The slave boundary
componentAn integer corresponding to the direction the variable this kernel acts in. (0 for x, 1 for y, 2 for z)
C++ Type:unsigned int
Options:
Description:An integer corresponding to the direction the variable this kernel acts in. (0 for x, 1 for y, 2 for z)
masterThe master boundary
C++ Type:BoundaryName
Options:
Description:The master boundary
nodal_areaThe nodal area
C++ Type:std::vector
Options:
Description:The nodal area
variableThe name of the variable that this kernel operates on
C++ Type:NonlinearVariableName
Options:
Description:The name of the variable that this kernel operates on

Required Parameters

disp_xThe x displacement
C++ Type:std::vector
Options:
Description:The x displacement
disp_yThe y displacement
C++ Type:std::vector
Options:
Description:The y displacement
disp_zThe z displacement
C++ Type:std::vector
Options:
Description:The z displacement
displacementsThe displacements appropriate for the simulation geometry and coordinate system
C++ Type:std::vector
Options:
Description:The displacements appropriate for the simulation geometry and coordinate system
formulationkinematicThe contact formulation
Default:kinematic
C++ Type:MooseEnum
Options:kinematic penalty augmented_lagrange tangential_penalty mortar
Description:The contact formulation
friction_coefficient0The friction coefficient
Default:0
C++ Type:double
Options:
Description:The friction coefficient
modelfrictionlessThe contact model to use
Default:frictionless
C++ Type:MooseEnum
Options:frictionless glued coulomb
Description:The contact model to use
normal_smoothing_distanceDistance from edge in parametric coordinates over which to smooth contact normal
C++ Type:double
Options:
Description:Distance from edge in parametric coordinates over which to smooth contact normal
normal_smoothing_methodMethod to use to smooth normals
C++ Type:MooseEnum
Options:edge_based nodal_normal_based
Description:Method to use to smooth normals
normalize_penaltyFalseWhether to normalize the penalty parameter with the nodal area for penalty contact.
Default:False
C++ Type:bool
Options:
Description:Whether to normalize the penalty parameter with the nodal area for penalty contact.
orderFIRSTThe finite element order: FIRST, SECOND, etc.
Default:FIRST
C++ Type:MooseEnum
Options:CONSTANT FIRST SECOND THIRD FOURTH
Description:The finite element order: FIRST, SECOND, etc.
penalty1e+08The penalty to apply. This can vary depending on the stiffness of your materials
Default:1e+08
C++ Type:double
Options:
Description:The penalty to apply. This can vary depending on the stiffness of your materials
tangential_toleranceTangential distance to extend edges of contact surfaces
C++ Type:double
Options:
Description:Tangential distance to extend edges of contact surfaces

Optional Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector
Options:
Description:Adds user-defined labels for accessing object parameters via control logic.
drop_duplicate_pointsTrueBy default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.
Default:True
C++ Type:bool
Options:
Description:By default points added to a DiracKernel are dropped if a point at the same locationhas been added before. If this option is set to false duplicate points are retainedand contribute to residual and Jacobian.
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
Description:Set the enabled status of the MooseObject.
use_displaced_meshTrueWhether 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:True
C++ Type:bool
Options:
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

extra_matrix_tagsThe extra tags for the matrices this Kernel should fill
C++ Type:std::vector
Options:
Description:The extra tags for the matrices this Kernel should fill
extra_vector_tagsThe extra tags for the vectors this Kernel should fill
C++ Type:std::vector
Options:
Description:The extra tags for the vectors this Kernel should fill
matrix_tagssystemThe tag for the matrices this Kernel should fill
Default:system
C++ Type:MultiMooseEnum
Options:nontime system
Description:The tag for the matrices this Kernel should fill
vector_tagsnontimeThe tag for the vectors this Kernel should fill
Default:nontime
C++ Type:MultiMooseEnum
Options:nontime time
Description:The tag for the vectors this Kernel should fill

Tagging Parameters

Input Files

modules/combined/test/tests/simple_contact/merged.i
modules/combined/test/tests/simple_contact/sm/merged_sm.i

modules/combined/test/tests/simple_contact/merged.i

[GlobalParams]
  volumetric_locking_correction= false
  displacements = 'disp_x disp_y disp_z'
[]

[Mesh]
  file = merged.e
[]

[Modules/TensorMechanics/Master]
  [./all]
    add_variables = true
    incremental = true
    generate_output = 'stress_xx stress_yy stress_zz stress_xy stress_yz stress_zx'
  [../]
[]

[DiracKernels]
  [./master_x]
    type = ContactMaster
    variable = disp_x
    component = 0
    boundary = 3
    slave = 2
  [../]

  [./master_y]
    type = ContactMaster
    variable = disp_y
    component = 1
    boundary = 3
    slave = 2
  [../]

  [./master_z]
    type = ContactMaster
    variable = disp_z
    component = 2
    boundary = 3
    slave = 2
  [../]

  [./slave_x]
    type = SlaveConstraint
    variable = disp_x
    component = 0
    boundary = 2
    master = 3
  [../]

  [./slave_y]
    type = SlaveConstraint
    variable = disp_y
    component = 1
    boundary = 2
    master = 3
  [../]

  [./slave_z]
    type = SlaveConstraint
    variable = disp_z
    component = 2
    boundary = 2
    master = 3
  [../]
[]

[BCs]
  [./left_x]
    type = DirichletBC
    variable = disp_x
    boundary = 1
    value = 0.0
  [../]

  [./left_y]
    type = DirichletBC
    variable = disp_y
    boundary = 1
    value = 0.0
  [../]

  [./left_z]
    type = DirichletBC
    variable = disp_z
    boundary = 1
    value = 0.0
  [../]

  [./right_x]
    type = DirichletBC
    variable = disp_x
    boundary = 4
    value = -0.0001
  [../]

  [./right_y]
    type = DirichletBC
    variable = disp_y
    boundary = 4
    value = 0.0
  [../]

  [./right_z]
    type = DirichletBC
    variable = disp_z
    boundary = 4
    value = 0.0
  [../]
[]

[Materials]
  [./stiffStuff]
    type = ComputeIsotropicElasticityTensor
    block = '1 2'
    youngs_modulus = 1e6
    poissons_ratio = 0.3
  [../]
  [./stiffStuff_stress]
    type = ComputeFiniteStrainElasticStress
    block = '1 2'
  [../]
[]

[Executioner]
  type = Transient
  solve_type = 'PJFNK'

  petsc_options = '-snes_ksp_ew'
  petsc_options_iname = '-pc_type '
  petsc_options_value = 'lu       '

  line_search = 'none'

  nl_abs_tol = 1e-8

  l_max_its = 20
  dt = 1.0
  num_steps = 1
[]

[Outputs]
  [./exodus]
    type = Exodus
    elemental_as_nodal = true
  [../]
[]

modules/combined/test/tests/simple_contact/sm/merged_sm.i

[GlobalParams]
  volumetric_locking_correction = false
[]

[Mesh]
  file = merged.e
  displacements = 'disp_x disp_y disp_z'
[]

[Variables]
  [./disp_x]
  [../]

  [./disp_y]
  [../]

  [./disp_z]
  [../]
[]

[AuxVariables]
  [./stress_xx]
    order = CONSTANT
    family = MONOMIAL
  [../]

  [./stress_yy]
    order = CONSTANT
    family = MONOMIAL
  [../]

  [./stress_zz]
    order = CONSTANT
    family = MONOMIAL
  [../]

  [./stress_xy]
    order = CONSTANT
    family = MONOMIAL
  [../]

  [./stress_yz]
    order = CONSTANT
    family = MONOMIAL
  [../]

  [./stress_zx]
    order = CONSTANT
    family = MONOMIAL
  [../]
[]

[SolidMechanics]
  [./solid]
    disp_x = disp_x
    disp_y = disp_y
    disp_z = disp_z
  [../]
[]

[DiracKernels]
  [./master_x]
    type = ContactMaster
    variable = disp_x
    component = 0
    boundary = 3
    slave = 2
  [../]

  [./master_y]
    type = ContactMaster
    variable = disp_y
    component = 1
    boundary = 3
    slave = 2
  [../]

  [./master_z]
    type = ContactMaster
    variable = disp_z
    component = 2
    boundary = 3
    slave = 2
  [../]

  [./slave_x]
    type = SlaveConstraint
    variable = disp_x
    component = 0
    boundary = 2
    master = 3
  [../]

  [./slave_y]
    type = SlaveConstraint
    variable = disp_y
    component = 1
    boundary = 2
    master = 3
  [../]

  [./slave_z]
    type = SlaveConstraint
    variable = disp_z
    component = 2
    boundary = 2
    master = 3
  [../]
[]

[AuxKernels]
  [./stress_xx]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_xx
    index = 0
  [../]

  [./stress_yy]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_yy
    index = 1
  [../]

  [./stress_zz]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_zz
    index = 2
  [../]

  [./stress_xy]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_xy
    index = 3
  [../]

  [./stress_yz]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_yz
    index = 4
  [../]

  [./stress_zx]
    type = MaterialTensorAux
    tensor = stress
    variable = stress_zx
    index = 5
  [../]
[]

[BCs]
  [./left_x]
    type = DirichletBC
    variable = disp_x
    boundary = 1
    value = 0.0
  [../]

  [./left_y]
    type = DirichletBC
    variable = disp_y
    boundary = 1
    value = 0.0
  [../]

  [./left_z]
    type = DirichletBC
    variable = disp_z
    boundary = 1
    value = 0.0
  [../]

  [./right_x]
    type = DirichletBC
    variable = disp_x
    boundary = 4
    value = -0.0001
  [../]

  [./right_y]
    type = DirichletBC
    variable = disp_y
    boundary = 4
    value = 0.0
  [../]

  [./right_z]
    type = DirichletBC
    variable = disp_z
    boundary = 4
    value = 0.0
  [../]
[]

[Materials]
  [./stiffStuff1]
    type = Elastic
    block = 1

    disp_x = disp_x
    disp_y = disp_y
    disp_z = disp_z

    youngs_modulus = 1e6
    poissons_ratio = 0.3
  [../]

  [./stiffStuff2]
    type = Elastic
    block = 2

    disp_x = disp_x
    disp_y = disp_y
    disp_z = disp_z

    youngs_modulus = 1e6
    poissons_ratio = 0.3
  [../]
[]

[Executioner]
  type = Transient
  solve_type = 'PJFNK'

  petsc_options = '-snes_ksp_ew'
  petsc_options_iname = '-pc_type '
  petsc_options_value = 'lu       '

  line_search = 'none'

  nl_abs_tol = 1e-8

  l_max_its = 20
  dt = 1.0
  num_steps = 1
[]

[Outputs]
  file_base = merged_out
  [./exodus]
    type = Exodus
    elemental_as_nodal = true
  [../]
[]

Input Parameters
Input Files

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