- crack_direction_methodMethod to determine direction of crack propagation. Choices are: CrackDirectionVector CrackMouth CurvedCrackFront
C++ Type:MooseEnum
Description:Method to determine direction of crack propagation. Choices are: CrackDirectionVector CrackMouth CurvedCrackFront
- incrementalFalseFlag to indicate whether an incremental or total model is being used.
Default:False
C++ Type:bool
Description:Flag to indicate whether an incremental or total model is being used.
- integralsDomain integrals to calculate. Choices are: JIntegral InteractionIntegralKI InteractionIntegralKII InteractionIntegralKIII InteractionIntegralT
C++ Type:MultiMooseEnum
Description:Domain integrals to calculate. Choices are: JIntegral InteractionIntegralKI InteractionIntegralKII InteractionIntegralKIII InteractionIntegralT
DomainIntegralAction
Creates the MOOSE objects needed to compute fraction domain integrals
Description
The DomainIntegral action is used to set up all of the objects used in computing all fracture domain integrals, including the -integral, interaction integral, and T-stress. To use the fracture domain integrals, one must set up a model that incorporates a crack using one of two techniques:
Meshed crack: The crack can be explicity included by creating a mesh with a topology that conforms to the crack. The location of the crack tip is provided to the code by defining a nodeset that includes all nodes in the finite element mesh that are located along the crack front. For 2D analyses, this nodeset would only contain a single node at the crack tip. For 3D analyses, the mesh connectivity is used to construct a set of line segments that connect these nodes, and this is used to order the crack nodes.
XFEM: Rather than defining the topology of the crack through the mesh, XFEM can be used to cut the mesh. In this case, a set of points, which does not need to conform to points in the mesh, must be provided by the user, and is used to define the location of the crack for coumputing the fracture integrals. Fracture integrals are computed at the locations of these points, in the order provided by the user.
Input Parameters
- 2dFalseTreat body as two-dimensional
Default:False
C++ Type:bool
Description:Treat body as two-dimensional
- active__all__ If specified only the blocks named will be visited and made active
Default:__all__
C++ Type:std::vector
Description:If specified only the blocks named will be visited and made active
- axis_2d2Out of plane axis for models treated as two-dimensional (0=x, 1=y, 2=z)
Default:2
C++ Type:unsigned int
Description:Out of plane axis for models treated as two-dimensional (0=x, 1=y, 2=z)
- blockThe block ids where integrals are defined
C++ Type:std::vector
Description:The block ids where integrals are defined
- boundaryThe list of boundary IDs from the mesh where this boundary condition applies
C++ Type:std::vector
Description:The list of boundary IDs from the mesh where this boundary condition applies
- closed_loopFalseSet of points forms forms a closed loop
Default:False
C++ Type:bool
Description:Set of points forms forms a closed loop
- convert_J_to_KFalseConvert J-integral to stress intensity factor K.
Default:False
C++ Type:bool
Description:Convert J-integral to stress intensity factor K.
- crack_direction_vectorDirection of crack propagation
C++ Type:libMesh::VectorValue
Description:Direction of crack propagation
- crack_direction_vector_end_1Direction of crack propagation for the node at end 1 of the crack
C++ Type:libMesh::VectorValue
Description:Direction of crack propagation for the node at end 1 of the crack
- crack_direction_vector_end_2Direction of crack propagation for the node at end 2 of the crack
C++ Type:libMesh::VectorValue
Description:Direction of crack propagation for the node at end 2 of the crack
- crack_end_direction_methodNoSpecialTreatmentMethod to determine direction of crack propagation at ends of crack. Choices are: NoSpecialTreatment CrackDirectionVector
Default:NoSpecialTreatment
C++ Type:MooseEnum
Description:Method to determine direction of crack propagation at ends of crack. Choices are: NoSpecialTreatment CrackDirectionVector
- crack_front_pointsSet of points to define crack front
C++ Type:std::vector
Description:Set of points to define crack front
- crack_front_points_providerThe UserObject provides the crack front points from XFEM GeometricCutObject
C++ Type:UserObjectName
Description:The UserObject provides the crack front points from XFEM GeometricCutObject
- crack_mouth_boundaryBoundaries whose average coordinate defines the crack mouth
C++ Type:std::vector
Description:Boundaries whose average coordinate defines the crack mouth
- disp_xThe x displacement
C++ Type:VariableName
Description:The x displacement
- disp_yThe y displacement
C++ Type:VariableName
Description:The y displacement
- disp_zThe z displacement
C++ Type:VariableName
Description:The z displacement
- displacementsThe displacements appropriate for the simulation geometry and coordinate system
C++ Type:std::vector
Description:The displacements appropriate for the simulation geometry and coordinate system
- eigenstrain_namesList of eigenstrains applied in the strain calculation
C++ Type:std::vector
Description:List of eigenstrains applied in the strain calculation
- equivalent_kFalseCalculate an equivalent K from KI, KII and KIII, assuming self-similar crack growth.
Default:False
C++ Type:bool
Description:Calculate an equivalent K from KI, KII and KIII, assuming self-similar crack growth.
- familyLAGRANGESpecifies the family of FE shape functions to use for q AuxVariables
Default:LAGRANGE
C++ Type:std::string
Description:Specifies the family of FE shape functions to use for q AuxVariables
- first_ringThe number of rings of nodes to generate
C++ Type:unsigned int
Description:The number of rings of nodes to generate
- inactiveIf specified blocks matching these identifiers will be skipped.
C++ Type:std::vector
Description:If specified blocks matching these identifiers will be skipped.
- intersecting_boundaryBoundaries intersected by ends of crack
C++ Type:std::vector
Description:Boundaries intersected by ends of crack
- j_integral_radius_innerRadius for J-Integral calculation
C++ Type:std::vector
Description:Radius for J-Integral calculation
- j_integral_radius_outerRadius for J-Integral calculation
C++ Type:std::vector
Description:Radius for J-Integral calculation
- last_ringThe number of rings of nodes to generate
C++ Type:unsigned int
Description:The number of rings of nodes to generate
- nringsThe number of rings of nodes to generate
C++ Type:unsigned int
Description:The number of rings of nodes to generate
- number_points_from_providerThe number of crack front points, only needed if crack_front_points_provider is used.
C++ Type:unsigned int
Description:The number of crack front points, only needed if crack_front_points_provider is used.
- orderFIRSTSpecifies the order of the FE shape function to use for q AuxVariables
Default:FIRST
C++ Type:std::string
Description:Specifies the order of the FE shape function to use for q AuxVariables
- output_qTrueOutput q
Default:True
C++ Type:bool
Description:Output q
- output_variableVariable values to be reported along the crack front
C++ Type:std::vector
Description:Variable values to be reported along the crack front
- poissons_ratioPoisson's ratio
C++ Type:double
Description:Poisson's ratio
- position_typeDistanceThe method used to calculate position along crack front. Options are: Angle Distance
Default:Distance
C++ Type:MooseEnum
Description:The method used to calculate position along crack front. Options are: Angle Distance
- q_function_ringsFalseGenerate rings of nodes for q-function
Default:False
C++ Type:bool
Description:Generate rings of nodes for q-function
- q_function_typeGeometryThe method used to define the integration domain. Options are: Geometry Topology
Default:Geometry
C++ Type:MooseEnum
Description:The method used to define the integration domain. Options are: Geometry Topology
- radius_innerInner radius for volume integral domain
C++ Type:std::vector
Description:Inner radius for volume integral domain
- radius_outerOuter radius for volume integral domain
C++ Type:std::vector
Description:Outer radius for volume integral domain
- ring_firstThe first ring of elements for volume integral domain
C++ Type:unsigned int
Description:The first ring of elements for volume integral domain
- ring_lastThe last ring of elements for volume integral domain
C++ Type:unsigned int
Description:The last ring of elements for volume integral domain
- solid_mechanicsFalseSet to true if the solid_mechanics system is used.
Default:False
C++ Type:bool
Description:Set to true if the solid_mechanics system is used.
- symmetry_planeAccount for a symmetry plane passing through the plane of the crack, normal to the specified axis (0=x, 1=y, 2=z)
C++ Type:unsigned int
Description:Account for a symmetry plane passing through the plane of the crack, normal to the specified axis (0=x, 1=y, 2=z)
- t_stressFalseCalculate T-stress
Default:False
C++ Type:bool
Description:Calculate T-stress
- temperatureThe temperature
C++ Type:VariableName
Description:The temperature
- youngs_modulusYoung's modulus
C++ Type:double
Description:Young's modulus