NodalStickConstraint

Sticky nodal constraint for contact

Both kinematic and penalty formulations are implemented.

For the penalty formulation, the contribution to the residual for the constrained nodes on the primary side is equal to

and the opposite on the secondary side, where is usually the displacement component variable value at the node for mechanical contact applications.

commentnote

The primary and secondary variables must be different for this implementation of the nodal stick constraint.

Input Parameters

  • boundaryThe primary boundary

    C++ Type:BoundaryName

    Unit:(no unit assumed)

    Controllable:No

    Description:The primary boundary

  • penaltyStiffness of the spring.

    C++ Type:double

    Unit:(no unit assumed)

    Controllable:No

    Description:Stiffness of the spring.

  • secondaryThe secondary boundary

    C++ Type:BoundaryName

    Unit:(no unit assumed)

    Controllable:No

    Description:The secondary boundary

  • variableThe name of the variable that this residual object operates on

    C++ Type:NonlinearVariableName

    Unit:(no unit assumed)

    Controllable:No

    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

    Unit:(no unit assumed)

    Options:penalty, kinematic

    Controllable:No

    Description:Formulation used to calculate constraint - penalty or kinematic.

  • variable_secondaryThe name of the variable for the secondary nodes, if it is different from the primary nodes' variable

    C++ Type:NonlinearVariableName

    Unit:(no unit assumed)

    Controllable:No

    Description:The name of the variable for the secondary nodes, if it is different from the primary nodes' variable

Optional Parameters

  • absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution

  • extra_matrix_tagsThe extra tags for the matrices this Kernel should fill

    C++ Type:std::vector<TagName>

    Unit:(no unit assumed)

    Controllable:No

    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>

    Unit:(no unit assumed)

    Controllable:No

    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

    Unit:(no unit assumed)

    Options:nontime, system

    Controllable:No

    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

    Unit:(no unit assumed)

    Options:nontime, time

    Controllable:No

    Description:The tag for the vectors this Kernel should fill

Tagging Parameters

  • 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.

  • 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.

Advanced Parameters