- boundaryThe list of boundary IDs from the mesh where this object applies
C++ Type:std::vector<BoundaryName>
Controllable:No
Description:The list of boundary IDs from the mesh where this object applies
- moment_directionMoment direction
C++ Type:libMesh::VectorValue<double>
Unit:(no unit assumed)
Controllable:No
Description:Moment direction
- reference_pointReference point on the sideset about which the moment is computed
C++ Type:libMesh::VectorValue<double>
Unit:(no unit assumed)
Controllable:No
Description:Reference point on the sideset about which the moment is computed
Sideset Moment Postprocessor
Computes the product of integrated reaction force and lever arm in a user-specified direction on a sideset from the surface traction
Description
SidesetMoment computes the integral of the stress tensor along vector or pressure acting on a sideset multiplied by the lever arm. When stress tensor is given as an input, SidesetMoment is computed as:
where is the sideset moment, is the current quadrature point, is the reference point, and is the moment direction vector. The quantity gives a scalar and when multiplied with gives a force-like vector. The cross-product of this force-like vector and the relative distance vector between the current qp and the reference point gives the moment vector. This moment vector when dotted with the moment_direction vector gives the scalar moment about the required direction. When using pressure, the computation of the SidesetMoment is similar, except that the force-like vector is simply :
The figure below illustrates SidesetMoment for a simple example. Moment is to be computed about the z-axis (out-of-plane) at the reference point using either the stress tensor or the pressure at the right boundary. If the stress tensor is used, the normal vector to the boundary is and the desired stress direction is along x-axis (i.e., ). The quantity is a force-like vector. If the pressure is used, no operations on are necessary since it is a scalar, and is the force-like vector. is the relative distance vector between the the current quadrature and reference points. The cross-product of the force-like vector with the relative distance vector gives the moment vector either or . Dotting this moment vector with the moment direction vector gives the scalar moment about the z-axis.
Figure 1: Illustration of the SidesetMoment Postprocessor for a simple example.
Input Parameters
- pressureThe scalar pressure
C++ Type:std::vector<VariableName>
Unit:(no unit assumed)
Controllable:No
Description:The scalar pressure
- stress_directionStress direction
C++ Type:libMesh::VectorValue<double>
Unit:(no unit assumed)
Controllable:No
Description:Stress direction
- stress_tensorThe rank two stress tensor name
C++ Type:MaterialPropertyName
Unit:(no unit assumed)
Controllable:No
Description:The rank two stress tensor name
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
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).
- 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
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.
- 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
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
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
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
Controllable:No
Description:Forces the UserObject to be executed in PREIC during initial setup
Execution Scheduling Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
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
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- outputsVector of output names where you would like to restrict the output of variables(s) associated with this object
C++ Type:std::vector<OutputName>
Controllable:No
Description:Vector of output names where you would like to restrict the output of variables(s) associated with this object
- use_displaced_meshTrueWhether 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:True
C++ Type:bool
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
- 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
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.