CrackTipEnrichmentCutOffBC

MOOSE permits variables to be restricted to specific blocks, but currently does not provide a straightforward way to add variables to just the enriched region near the crack tip. An inefficient workaround is to add new variables associated with the enrichment shape functions for the whole mesh and then to simply fix DOFs to zero for those nodes with basis function supports that are far away from any crack tip.

Example Input Syntax

Imposes the essential boundary condition $var element = document.getElementById("moose-equation-2966b1df-2699-433b-8674-619bcae2c183");katex.render("u=g", element, {displayMode:false,throwOnError:false,macros:{"\\pf":"\\frac{\\partial #1}{\\partial #2}"}});$ , where $var element = document.getElementById("moose-equation-ad565725-312c-4ff4-8298-5b2087e21737");katex.render("g", element, {displayMode:false,throwOnError:false,macros:{"\\pf":"\\frac{\\partial #1}{\\partial #2}"}});$ is a constant, controllable value.

Input Parameters

boundaryThe list of boundary IDs from the mesh where this boundary condition applies
C++ Type:std::vector
Options:
Description:The list of boundary IDs from the mesh where this boundary condition applies
crack_front_definitionThe CrackFrontDefinition user object name
C++ Type:UserObjectName
Options:
Description:The CrackFrontDefinition user object name
cut_off_radiusThe cut off radius of crack tip enrichment functions
C++ Type:double
Options:
Description:The cut off radius of crack tip enrichment functions
valueValue of the BC
C++ Type:double
Options:
Description:Value of the BC
variableThe name of the variable that this boundary condition applies to
C++ Type:NonlinearVariableName
Options:
Description:The name of the variable that this boundary condition applies to

Required Parameters

diag_save_inThe name of auxiliary variables to save this BC's diagonal jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector
Options:
Description:The name of auxiliary variables to save this BC's diagonal jacobian contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
displacementsThe displacements
C++ Type:std::vector
Options:
Description:The displacements
presetTrueWhether or not to preset the BC (apply the value before the solve begins). Note that the default value of this parameter is handled by the use_legacy_dirichlet_bc parameter on the MooseApp.
Default:True
C++ Type:bool
Options:
Description:Whether or not to preset the BC (apply the value before the solve begins). Note that the default value of this parameter is handled by the use_legacy_dirichlet_bc parameter on the MooseApp.
save_inThe name of auxiliary variables to save this BC's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)
C++ Type:std::vector
Options:
Description:The name of auxiliary variables to save this BC's residual contributions to. Everything about that variable must match everything about this variable (the type, what blocks it's on, etc.)

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.
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
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_tagssystem timeThe tag for the matrices this Kernel should fill
Default:system time
C++ Type:MultiMooseEnum
Options:nontime system time
Description:The tag for the matrices this Kernel should fill
vector_tagsresidualThe tag for the vectors this Kernel should fill
Default:residual
C++ Type:MultiMooseEnum
Options:nontime time residual
Description:The tag for the vectors this Kernel should fill

Tagging Parameters

Example Input Syntax
Input Parameters

Application Usage

Physics and Syntax

Application Development

Framework Development

MOOSEDocs

Infrastructure

Questions

Information and Tools