- constraint_typesType of each constraint: strain, stress, or none. The types are specified in the column-major order, and there must be 9 entries in total.
C++ Type:MultiMooseEnum
Unit:(no unit assumed)
Controllable:No
Description:Type of each constraint: strain, stress, or none. The types are specified in the column-major order, and there must be 9 entries in total.
- targetsFunctions giving the targets to hit for constraint types that are not none.
C++ Type:std::vector<FunctionName>
Unit:(no unit assumed)
Controllable:No
Description:Functions giving the targets to hit for constraint types that are not none.
HomogenizationConstraint
Computes a volumetric homogenization constraint
Overview
This UserObject actually performs the volume integral over the domain to determine the residual of the constraints imposed by the Lagrangian kernel homogenization system. A separate UserObject is required because ScalarKernel derived classes do not access each element during residual and Jacobian assembly. This user object then performs and stores the integrals for the kernel. For more details refer to the homogenization system documentation.
The SolidMechanics/QuasiStatic can add this object automatically, which is the recommended way to set up homogenization constraints.
Example Input File Syntax
This example manually specifies the parameters required to initialize the object for a large deformation, 3D example. The targets parameters are the Functions specifying the constrained cell-average values as a function of time. The constraint_types parameters controls the type of constraint (deformation or stress) for each input. The homogenization system documentation lists the order of these inputs for each problem dimension/type. The large_kinematics flag controls whether the constraints are on the deformation gradient or 1st Piola Kirchhoff stress (true) or the engineering strain and stress (false).
warningwarning
This object should be run with execute_on = 'initial linear' to provide the updated integral values when required by the kernels.
[UserObjects]
[homogenization]
type = HomogenizationConstraint
constraint_types = ${constraint_types}
targets = ${targets}
execute_on = 'INITIAL LINEAR NONLINEAR'
[]
[]
Input Parameters
- base_nameMaterial property base name
C++ Type:std::string
Unit:(no unit assumed)
Controllable:No
Description:Material property base name
- blockThe list of blocks (ids or names) that this object will be applied
C++ Type:std::vector<SubdomainName>
Unit:(no unit assumed)
Controllable:No
Description:The list of blocks (ids or names) that this object will be applied
- execute_onTIMESTEP_ENDThe list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
Default:TIMESTEP_END
C++ Type:ExecFlagEnum
Unit:(no unit assumed)
Controllable:No
Description:The list of flag(s) indicating when this object should be executed. For a description of each flag, see https://mooseframework.inl.gov/source/interfaces/SetupInterface.html.
- large_kinematicsFalseUsing large displacements?
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Using large displacements?
- prop_getter_suffixAn optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:An optional suffix parameter that can be appended to any attempt to retrieve/get material properties. The suffix will be prepended with a '_' character.
- use_interpolated_stateFalseFor the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:For the old and older state use projected material properties interpolated at the quadrature points. To set up projection use the ProjectedStatefulMaterialStorageAction.
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
Unit:(no unit assumed)
Controllable:No
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<std::string>
Unit:(no unit assumed)
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- execution_order_group0Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
Default:0
C++ Type:int
Unit:(no unit assumed)
Controllable:No
Description:Execution order groups are executed in increasing order (e.g., the lowest number is executed first). Note that negative group numbers may be used to execute groups before the default (0) group. Please refer to the user object documentation for ordering of user object execution within a group.
- force_postauxFalseForces the UserObject to be executed in POSTAUX
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in POSTAUX
- force_preauxFalseForces the UserObject to be executed in PREAUX
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in PREAUX
- force_preicFalseForces the UserObject to be executed in PREIC during initial setup
Default:False
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
Description:Forces the UserObject to be executed in PREIC during initial setup
- implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Unit:(no unit assumed)
Controllable:No
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
Unit:(no unit assumed)
Controllable:No
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
Unit:(no unit assumed)
Controllable:No
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.