XFEMMaterialTensorMarkerUserObject

under construction:Undocumented Class

The XFEMMaterialTensorMarkerUserObject 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.


# XFEMMaterialTensorMarkerUserObject

!syntax description /UserObjects/XFEMMaterialTensorMarkerUserObject

## Overview

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

## Example Input File Syntax

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

!syntax parameters /UserObjects/XFEMMaterialTensorMarkerUserObject

!syntax inputs /UserObjects/XFEMMaterialTensorMarkerUserObject

!syntax children /UserObjects/XFEMMaterialTensorMarkerUserObject

!syntax description /UserObjects/XFEMMaterialTensorMarkerUserObject

Input Parameters

averageFalseShould the tensor quantity be averaged over the quadruature points?
Default:False
C++ Type:bool
Options:
Description:Should the tensor quantity be averaged over the quadruature points?
tensorThe material tensor name.
C++ Type:std::string
Options:
Description:The material tensor name.
thresholdThe threshold for crack growth.
C++ Type:double
Options:
Description:The threshold for crack growth.

Required Parameters

blockThe list of block ids (SubdomainID) that this object will be applied
C++ Type:std::vector
Options:
Description:The list of block ids (SubdomainID) that this object will be applied
direction1 0 0Direction vector
Default:1 0 0
C++ Type:libMesh::VectorValue
Options:
Description:Direction vector
execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Options:NONE INITIAL LINEAR NONLINEAR TIMESTEP_END TIMESTEP_BEGIN FINAL CUSTOM
Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.
index-1The index into the tensor, from 0 to 5 (xx, yy, zz, xy, yz, zx).
Default:-1
C++ Type:int
Options:
Description:The index into the tensor, from 0 to 5 (xx, yy, zz, xy, yz, zx).
initiate_on_boundaryPermit cracks to initiate in elements adjacent to specified boundaries
C++ Type:std::vector
Options:
Description:Permit cracks to initiate in elements adjacent to specified boundaries
point10 0 0Start point for axis used to calculate some material tensor quantities
Default:0 0 0
C++ Type:libMesh::VectorValue
Options:
Description:Start point for axis used to calculate some material tensor quantities
point20 1 0End point for axis used to calculate some material tensor quantities
Default:0 1 0
C++ Type:libMesh::VectorValue
Options:
Description:End point for axis used to calculate some material tensor quantities
quantityA scalar quantity to compute: VonMises EffectiveStrain Hydrostatic Direction Hoop Radial Axial MaxPrincipal MedPrincipal MinPrincipal FirstInvariant SecondInvariant ThirdInvariant TriAxiality VolumetricStrain
C++ Type:MooseEnum
Options:VonMises EffectiveStrain Hydrostatic Direction Hoop Radial Axial MaxPrincipal MedPrincipal MinPrincipal FirstInvariant SecondInvariant ThirdInvariant TriAxiality VolumetricStrain
Description:A scalar quantity to compute: VonMises EffectiveStrain Hydrostatic Direction Hoop Radial Axial MaxPrincipal MedPrincipal MinPrincipal FirstInvariant SecondInvariant ThirdInvariant TriAxiality VolumetricStrain
random_range0Range of a uniform random distribution for the threshold
Default:0
C++ Type:double
Options:
Description:Range of a uniform random distribution for the threshold
secondary_cracksFalseshould secondary cracks be allowed
Default:False
C++ Type:bool
Options:
Description:should secondary cracks be allowed

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
Options:
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
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

Input Files

modules/xfem/test/tests/solid_mechanics_basic/sm/crack_propagation_2d.i

modules/xfem/test/tests/solid_mechanics_basic/sm/crack_propagation_2d.i

[GlobalParams]
  order = FIRST
  family = LAGRANGE
[]

[XFEM]
  qrule = volfrac
  output_cut_plane = true
  use_crack_growth_increment = true
  crack_growth_increment = 0.2
[]

[Mesh]
  type = GeneratedMesh
  dim = 2
  nx = 11
  ny = 11
  xmin = 0.0
  xmax = 1.0
  ymin = 0.0
  ymax = 1.0
  elem_type = QUAD4
  displacements = 'disp_x disp_y'
[]

[UserObjects]
  [./line_seg_cut_uo]
    type = LineSegmentCutUserObject
    cut_data = '1.0  0.5  0.7  0.5'
    time_start_cut = 0.0
    time_end_cut = 0.0
  [../]
  [./xfem_marker_uo]
    type = XFEMMaterialTensorMarkerUserObject
    execute_on = timestep_end
    tensor = stress
    quantity = MaxPrincipal
    threshold = 5e+1
    average = true
  [../]
[]

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

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

[Functions]
  [./pull]
    type = PiecewiseLinear
    x='0  50   100'
    y='0  0.02 0.1'
  [../]
[]

[BCs]
  [./bottomx]
    type = DirichletBC
    boundary = bottom
    variable = disp_x
    value = 0.0
  [../]
  [./bottomy]
    type = DirichletBC
    boundary = bottom
    variable = disp_y
    value = 0.0
  [../]
  [./topx]
    type = DirichletBC
    boundary = top
    variable = disp_x
    value = 0.0
  [../]
  [./topy]
    type = FunctionDirichletBC
    boundary = top
    variable = disp_y
    function = pull
  [../]
[]

[Materials]
  [./linelast]
    type = Elastic
    block = 0
    disp_x = disp_x
    disp_y = disp_y
    poissons_ratio = 0.3
    youngs_modulus = 1e6
    formulation = NonlinearPlaneStrain
  [../]
[]

[Executioner]
  type = Transient

  solve_type = 'PJFNK'
  petsc_options_iname = '-ksp_gmres_restart -pc_type -pc_hypre_type -pc_hypre_boomeramg_max_iter'
  petsc_options_value = '201                hypre    boomeramg      8'

  line_search = 'none'

  [./Predictor]
    type = SimplePredictor
    scale = 1.0
  [../]

# controls for linear iterations
  l_max_its = 100
  l_tol = 1e-2

# controls for nonlinear iterations
  nl_max_its = 15
  nl_rel_tol = 1e-14
  nl_abs_tol = 1e-9

# time control
  start_time = 0.0
  dt = 1.0
  end_time = 2.0
  num_steps = 5000

  max_xfem_update = 1
[]

[Outputs]
  file_base = crack_propagation_2d_out
  exodus = true
  execute_on = timestep_end
  [./console]
    type = Console
    output_linear = true
  [../]
[]

Input Parameters
Input Files

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