EqualValueBoundaryConstraint

construction:Undocumented Class

The EqualValueBoundaryConstraint 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.


# EqualValueBoundaryConstraint

!syntax description /Constraints/EqualValueBoundaryConstraint

## Overview

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

## Example Input File Syntax

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

!syntax parameters /Constraints/EqualValueBoundaryConstraint

!syntax inputs /Constraints/EqualValueBoundaryConstraint

!syntax children /Constraints/EqualValueBoundaryConstraint

Constraint for enforcing that variables on each side of a boundary are equivalent.

Input Parameters

penaltyThe penalty used for the boundary term
C++ Type:double
Options:
Description:The penalty used for the boundary term
variableThe name of the variable that this residual object operates on
C++ Type:NonlinearVariableName
Options:
Description:The name of the variable that this residual object operates on

Required Parameters

formulationpenaltyFormulation used to calculate constraint - penalty or kinematic.
Default:penalty
C++ Type:MooseEnum
Options:penalty, kinematic
Description:Formulation used to calculate constraint - penalty or kinematic.
primary4294967295The ID of the primary node. If no ID is provided, first node of secondary set is chosen.
Default:4294967295
C++ Type:unsigned int
Options:
Description:The ID of the primary node. If no ID is provided, first node of secondary set is chosen.
secondaryNaNThe boundary ID associated with the secondary side
Default:NaN
C++ Type:BoundaryName
Options:
Description:The boundary ID associated with the secondary side
secondary_node_idsThe IDs of the secondary node
C++ Type:std::vector<unsigned int>
Options:
Description:The IDs of the secondary node

Optional Parameters

control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Options:
Description:Adds user-defined labels for accessing object parameters via control logic.
enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Options:
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
Options:
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
Options:
Description:The seed for the master random number generator
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
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<TagName>
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<TagName>
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/axisymmetric_2d3d_solution_function/2d.i)
(test/tests/constraints/equal_value_boundary_constraint/equal_value_boundary_constraint_test.i)
(test/tests/constraints/equal_value_boundary_constraint/adaptivity.i)

(modules/combined/test/tests/axisymmetric_2d3d_solution_function/2d.i)

[GlobalParams]
  order = FIRST
  family = LAGRANGE
  displacements = 'disp_x disp_y'
[]

[Problem]
  coord_type = RZ
[]

[Mesh]
  file = 2d.e
[]

[Variables]
  [./disp_x]
  [../]
  [./disp_y]
  [../]
  [./temp]
    initial_condition = 400
  [../]
[]

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

[Functions]
  [./temp_inner_func]
    type = PiecewiseLinear
    xy_data = '0 400
               1 350'
  [../]
  [./temp_outer_func]
    type = PiecewiseLinear
    xy_data = '0 400
               1 400'
  [../]
  [./press_func]
    type = PiecewiseLinear
    xy_data = '0 15
               1 15'
  [../]
[]

[Kernels]
  [./heat]
    type = HeatConduction
    variable = temp
  [../]
[]

[Modules/TensorMechanics/Master]
  [./all]
    volumetric_locking_correction = true
    add_variables  = true
    incremental = true
    strain = FINITE
    eigenstrain_names = thermal_expansion
    generate_output = 'stress_xx stress_yy stress_zz vonmises_stress hydrostatic_stress'
  [../]
[]

[AuxKernels]
  [./hoop_stress]
    type = RankTwoScalarAux
    rank_two_tensor = stress
    variable = hoop_stress
    scalar_type = HoopStress
    execute_on = timestep_end
  [../]
[]

[BCs]
  [./no_y]
    type = DirichletBC
    variable = disp_y
    boundary = '1'
    value = 0.0
  [../]

  [./Pressure]
    [./internal_pressure]
      boundary = '4'
      factor = 1.e6
      function = press_func
    [../]
  [../]

  [./t_in]
    type = FunctionDirichletBC
    variable = temp
    boundary = '4'
    function = temp_inner_func
  [../]

  [./t_out]
    type = FunctionDirichletBC
    variable = temp
    boundary = '2'
    function = temp_outer_func
  [../]
[]

[Constraints]
  [./disp_y]
    type = EqualValueBoundaryConstraint
    variable = disp_y
    primary = '65'
    secondary = '3'
    penalty = 1e18
  [../]
[]

[Materials]
  [./thermal1]
    type = HeatConductionMaterial
    block = '1'
    thermal_conductivity = 25.0
    specific_heat = 490.0
    temp = temp
  [../]

  [./elasticity_tensor]
    type = ComputeIsotropicElasticityTensor
    youngs_modulus = 193.05e9
    poissons_ratio = 0.3
  [../]

  [./stress]
    type = ComputeFiniteStrainElasticStress
  [../]

  [./thermal_expansion]
    type = ComputeThermalExpansionEigenstrain
    thermal_expansion_coeff = 13e-6
    stress_free_temperature = 295.00
    temperature = temp
    eigenstrain_name = thermal_expansion
  [../]

  [./density]
    type = Density
    block = '1'
    density = 8000.0
  [../]
[]

[Executioner]
  type = Transient
  solve_type = 'PJFNK'

  petsc_options = '-ksp_snes_ew'
  petsc_options_iname = '-ksp_gmres_restart -pc_type -pc_hypre_type -pc_hypre_boomeramg_max_iter'
  petsc_options_value = ' 201                hypre    boomeramg      4'
  line_search = 'none'
  l_max_its = 25
  nl_max_its = 20
  nl_rel_tol = 1e-9
  l_tol = 1e-2

  start_time = 0.0
  dt = 1
  end_time = 1
  dtmin = 1
[]

[Outputs]
  file_base = 2d_out
  exodus = true
  [./console]
    type = Console
    max_rows = 25
  [../]
[]

(test/tests/constraints/equal_value_boundary_constraint/equal_value_boundary_constraint_test.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 6
  ny = 6
  elem_type = QUAD4
  allow_renumbering = false
[]

[Variables]
  [./diffused]
    order = FIRST
    family = LAGRANGE
  [../]
[]

[Kernels]
  [./diff]
    type = Diffusion
    variable = diffused
  [../]
[]


[BCs]
  [./left]
    type = DirichletBC
    variable = diffused
    preset = false
    boundary = 'left'
    value = 1.0
  [../]
  [./right]
    type = DirichletBC
    variable = diffused
    preset = false
    boundary = 'right'
    value = 0.0
  [../]
[]

# Constraint System
[Constraints]
  [./y_top]
    type = EqualValueBoundaryConstraint
    variable = diffused
    primary = '45'    # node on boundary
    secondary = 'top'    # boundary
    penalty = 10e6
  [../]
[]

[Executioner]
  type = Steady

  solve_type = 'PJFNK'

  petsc_options_iname = ''
  petsc_options_value = ''

  line_search = 'none'
[]

[Postprocessors]
  active = ' '

  [./residual]
    type = Residual
  [../]

  [./nl_its]
    type = NumNonlinearIterations
  [../]

  [./lin_its]
    type = NumLinearIterations
  [../]
[]

[Outputs]
  execute_on = 'timestep_end'
  file_base = out
  exodus = true
[]

(test/tests/constraints/equal_value_boundary_constraint/adaptivity.i)

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 6
  ny = 6
[]

[Adaptivity]
  marker = 'box'
  [Markers]
    [box]
      type = BoxMarker
      bottom_left = '0 0 0'
      top_right = '1 1 0 '
      inside = 'refine'
      outside = 'do_nothing'
    []
  []
[]

[Variables]
  [diffused]
  []
[]

[Kernels]
  [diff]
    type = Diffusion
    variable = 'diffused'
  []
[]

[BCs]
  [left]
    type = DirichletBC
    variable = 'diffused'
    boundary = 'left'
    value = 1.0
  []
  [right]
    type = DirichletBC
    variable = 'diffused'
    boundary = 'right'
    value = 0.0
  []
[]

[Constraints]
  [y_top]
    type = EqualValueBoundaryConstraint
    variable = 'diffused'
    primary = '45'
    secondary = 'top'
    penalty = 10e6
  []
[]

[Executioner]
  type = Transient
  solve_type = NEWTON
  petsc_options_iname = '-pc_type'
  petsc_options_value = 'lu'
  automatic_scaling = true
  num_steps = 3
  nl_rel_tol = 1e-06
  nl_abs_tol = 1e-08
[]

[Outputs]
  execute_on = 'timestep_end'
  exodus = true
[]

Input Parameters
Input Files

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