GlobalStrainUserObject

Global Strain UserObject to provide Residual and diagonal Jacobian entry

Description

GlobalStrainUserObject calculates the residual and the jacobian values corresponding to the integral of the stress tensor. In this case, the stress is generated due to global strain or any applied stress on the whole simulation domain.

ScalarKernel GlobalStrain extracts the residual and jacobian values from this UserObject.

Example Input File Syntax

[./global_strain_uo]
  type = GlobalStrainUserObject
  applied_stress_tensor = '0.1 0.2 0 0 0 -0.2'
  execute_on = 'Initial Linear Nonlinear'
[../]
(modules/tensor_mechanics/test/tests/global_strain/global_strain.i)

Input Parameters

  • displacementsThe name of the displacement variables

    C++ Type:std::vector

    Options:

    Description:The name of the displacement variables

  • execute_onLINEARThe list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

    Default:LINEAR

    C++ Type:ExecFlagEnum

    Options:NONE INITIAL LINEAR NONLINEAR TIMESTEP_END TIMESTEP_BEGIN FINAL CUSTOM

    Description:The list of flag(s) indicating when this object should be executed, the available options include NONE, INITIAL, LINEAR, NONLINEAR, TIMESTEP_END, TIMESTEP_BEGIN, FINAL, CUSTOM.

  • blockThe list of block ids (SubdomainID) that this object will be applied

    C++ Type:std::vector

    Options:

    Description:The list of block ids (SubdomainID) that this object will be applied

  • base_nameMaterial properties base name

    C++ Type:std::string

    Options:

    Description:Material properties base name

  • applied_stress_tensorVector of values defining the constant applied stress to add, in order 11, 22, 33, 23, 13, 12

    C++ Type:std::vector

    Options:

    Description:Vector of values defining the constant applied stress to add, in order 11, 22, 33, 23, 13, 12

Optional Parameters

  • enableTrueSet the enabled status of the MooseObject.

    Default:True

    C++ Type:bool

    Options:

    Description:Set the enabled status of the MooseObject.

  • 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.

  • 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.

  • 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

    Options:

    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).

  • seed0The seed for the master random number generator

    Default:0

    C++ Type:unsigned int

    Options:

    Description:The seed for the master random number generator

  • 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

Advanced Parameters

Input Files