ComputePlasticHeatEnergy Class Reference

ComputePlasticHeatEnergy computes stress * (plastic_strain - plastic_strain_old) and, if currentlyComputingJacobian, then the derivative of this quantity wrt total strain. More...

#include <ComputePlasticHeatEnergy.h>

Inheritance diagram for ComputePlasticHeatEnergy:

Public Member Functions
	ComputePlasticHeatEnergy (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual void	computeQpProperties () override

Protected Attributes
const std::string	_base_name
	optional parameter that allows multiple mechanics materials to be defined More...
const MaterialProperty< RankTwoTensor > &	_plastic_strain
	plastic strain More...
const MaterialProperty< RankTwoTensor > &	_plastic_strain_old
	old value of plastic strain More...
const MaterialProperty< RankTwoTensor > &	_stress
	stress More...
const MaterialProperty< RankFourTensor > &	_Jacobian_mult
	d(stress)/d(total strain) More...
const MaterialProperty< RankFourTensor > &	_elasticity_tensor
	elasticity tensor More...
MaterialProperty< Real > &	_plastic_heat
	computed property: stress * (plastic_strain - plastic_strain_old) / dt More...
MaterialProperty< RankTwoTensor > &	_dplastic_heat_dstrain
	d(plastic_heat)/d(total strain) More...

Detailed Description

ComputePlasticHeatEnergy computes stress * (plastic_strain - plastic_strain_old) and, if currentlyComputingJacobian, then the derivative of this quantity wrt total strain.

Definition at line 26 of file ComputePlasticHeatEnergy.h.

Constructor & Destructor Documentation

ComputePlasticHeatEnergy()

ComputePlasticHeatEnergy::ComputePlasticHeatEnergy

(

const InputParameters &

parameters

)

Definition at line 28 of file ComputePlasticHeatEnergy.C.

  : DerivativeMaterialInterface<Material>(parameters),
    _base_name(isParamValid("base_name") ? getParam<std::string>("base_name") + "_" : ""),
    _plastic_strain(getMaterialProperty<RankTwoTensor>("plastic_strain")),
    _plastic_strain_old(getMaterialPropertyOld<RankTwoTensor>("plastic_strain")),
    _stress(getMaterialProperty<RankTwoTensor>(_base_name + "stress")),
    _Jacobian_mult(getMaterialProperty<RankFourTensor>(_base_name + "Jacobian_mult")),
    _elasticity_tensor(getMaterialProperty<RankFourTensor>(_base_name + "elasticity_tensor")),
    _plastic_heat(declareProperty<Real>(_base_name + "plastic_heat")),
    _dplastic_heat_dstrain(declareProperty<RankTwoTensor>(_base_name + "dplastic_heat_dstrain"))
{
}

Member Function Documentation

computeQpProperties()

void ComputePlasticHeatEnergy::computeQpProperties ( )

overrideprotectedvirtual

Definition at line 42 of file ComputePlasticHeatEnergy.C.

{
  _plastic_heat[_qp] =
      _stress[_qp].doubleContraction(_plastic_strain[_qp] - _plastic_strain_old[_qp]) / _dt;
  if (_fe_problem.currentlyComputingJacobian())
  {
    if (_plastic_strain[_qp] == _plastic_strain_old[_qp])
      // no plastic deformation, so _elasticity_tensor = _Jacobian_mult
      _dplastic_heat_dstrain[_qp] = RankTwoTensor();
    else
    {
      _dplastic_heat_dstrain[_qp] =
          (_plastic_strain[_qp] - _plastic_strain_old[_qp]).initialContraction(_Jacobian_mult[_qp]);
      _dplastic_heat_dstrain[_qp] += _stress[_qp];
      _dplastic_heat_dstrain[_qp] -=
          _stress[_qp].initialContraction(_elasticity_tensor[_qp].invSymm() * _Jacobian_mult[_qp]);
      _dplastic_heat_dstrain[_qp] /= _dt;
    }
  }
}

validParams()

InputParameters ComputePlasticHeatEnergy::validParams ( )

static

Definition at line 17 of file ComputePlasticHeatEnergy.C.

{
  InputParameters params = Material::validParams();
  params.addParam<std::string>("base_name",
                               "Optional parameter that allows the user to define "
                               "multiple mechanics material systems on the same "
                               "block, i.e. for multiple phases");
  params.addClassDescription("Plastic heat energy density = stress * plastic_strain_rate");
  return params;
}

Member Data Documentation

_base_name

const std::string ComputePlasticHeatEnergy::_base_name

protected

optional parameter that allows multiple mechanics materials to be defined

Definition at line 37 of file ComputePlasticHeatEnergy.h.

_dplastic_heat_dstrain

MaterialProperty<RankTwoTensor>& ComputePlasticHeatEnergy::_dplastic_heat_dstrain

protected

d(plastic_heat)/d(total strain)

Definition at line 58 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_elasticity_tensor

const MaterialProperty<RankFourTensor>& ComputePlasticHeatEnergy::_elasticity_tensor

protected

elasticity tensor

Definition at line 52 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_Jacobian_mult

const MaterialProperty<RankFourTensor>& ComputePlasticHeatEnergy::_Jacobian_mult

protected

d(stress)/d(total strain)

Definition at line 49 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_plastic_heat

MaterialProperty<Real>& ComputePlasticHeatEnergy::_plastic_heat

protected

computed property: stress * (plastic_strain - plastic_strain_old) / dt

Definition at line 55 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_plastic_strain

const MaterialProperty<RankTwoTensor>& ComputePlasticHeatEnergy::_plastic_strain

protected

plastic strain

Definition at line 40 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_plastic_strain_old

const MaterialProperty<RankTwoTensor>& ComputePlasticHeatEnergy::_plastic_strain_old

protected

old value of plastic strain

Definition at line 43 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

_stress

const MaterialProperty<RankTwoTensor>& ComputePlasticHeatEnergy::_stress

protected

stress

Definition at line 46 of file ComputePlasticHeatEnergy.h.

Referenced by computeQpProperties().

---

The documentation for this class was generated from the following files:

• tensor_mechanics/include/materials/ComputePlasticHeatEnergy.h
• tensor_mechanics/src/materials/ComputePlasticHeatEnergy.C