ComputeDeformGradBasedStress computes stress based on lagrangian strain definition. More...

#include <ComputeDeformGradBasedStress.h>

Inheritance diagram for ComputeDeformGradBasedStress:

Public Member Functions
	ComputeDeformGradBasedStress (const InputParameters &parameters)

Static Public Member Functions
static InputParameters	validParams ()

Protected Member Functions
virtual void	initQpStatefulProperties ()

virtual void	computeQpProperties ()

virtual void	computeQpStress ()

Protected Attributes
const MaterialProperty< RankTwoTensor > &	_deformation_gradient

const MaterialProperty< RankFourTensor > &	_elasticity_tensor

MaterialProperty< RankTwoTensor > &	_stress

MaterialProperty< RankFourTensor > &	_Jacobian_mult

Detailed Description

ComputeDeformGradBasedStress computes stress based on lagrangian strain definition.

Definition at line 26 of file ComputeDeformGradBasedStress.h.

Constructor & Destructor Documentation

◆ ComputeDeformGradBasedStress()

ComputeDeformGradBasedStress::ComputeDeformGradBasedStress ( const InputParameters & parameters )

Definition at line 30 of file ComputeDeformGradBasedStress.C.

   : DerivativeMaterialInterface<Material>(parameters),
     _deformation_gradient(getMaterialProperty<RankTwoTensor>("deform_grad_name")),
     _elasticity_tensor(getMaterialProperty<RankFourTensor>("elasticity_tensor_name")),
     _stress(declareProperty<RankTwoTensor>(getParam<MaterialPropertyName>("stress_name"))),
     _Jacobian_mult(declareProperty<RankFourTensor>(getParam<MaterialPropertyName>("jacobian_name")))
 {
 }

Member Function Documentation

◆ computeQpProperties()

void ComputeDeformGradBasedStress::computeQpProperties ( )

protectedvirtual

Definition at line 46 of file ComputeDeformGradBasedStress.C.

 {
   computeQpStress();
 }

◆ computeQpStress()

void ComputeDeformGradBasedStress::computeQpStress ( )

protectedvirtual

Definition at line 52 of file ComputeDeformGradBasedStress.C.

 {
   const RankTwoTensor iden(RankTwoTensor::initIdentity);
   RankTwoTensor ee =
       0.5 * (_deformation_gradient[_qp].transpose() * _deformation_gradient[_qp] - iden);
   RankTwoTensor pk2 = _elasticity_tensor[_qp] * ee;
  
   _stress[_qp] = _deformation_gradient[_qp] * pk2 * _deformation_gradient[_qp].transpose() /
                  _deformation_gradient[_qp].det();
   _Jacobian_mult[_qp] = _elasticity_tensor[_qp];
 }

Referenced by computeQpProperties().

◆ initQpStatefulProperties()

void ComputeDeformGradBasedStress::initQpStatefulProperties ( )

protectedvirtual

Definition at line 40 of file ComputeDeformGradBasedStress.C.

 {
   _stress[_qp].zero();
 }

◆ validParams()

InputParameters ComputeDeformGradBasedStress::validParams ( )

static

Definition at line 17 of file ComputeDeformGradBasedStress.C.

 {
   InputParameters params = Material::validParams();
   params.addClassDescription("Computes stress based on Lagrangian strain");
   params.addRequiredParam<MaterialPropertyName>("deform_grad_name",
                                                 "Name of deformation gradient variable");
   params.addRequiredParam<MaterialPropertyName>("elasticity_tensor_name",
                                                 "Name of elasticity tensor variable");
   params.addRequiredParam<MaterialPropertyName>("stress_name", "Name of stress variable");
   params.addRequiredParam<MaterialPropertyName>("jacobian_name", "Name of Jacobian variable");
   return params;
 }