ComputeVolumetricDeformGrad.C

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#include "ComputeVolumetricDeformGrad.h"

registerMooseObject("SolidMechanicsApp", ComputeVolumetricDeformGrad);

InputParameters
ComputeVolumetricDeformGrad::validParams()
{
  InputParameters params = Material::validParams();
  params.addClassDescription(
      "Computes volumetric deformation gradient and adjusts the total deformation gradient");
  params.addRequiredParam<MaterialPropertyName>(
      "pre_deform_grad_name", "Name of pre-adjusted deformation gradient variable");
  params.addRequiredParam<MaterialPropertyName>("volumetric_deform_grad_name",
                                                "Name of volumetric deformation gradient variable");
  params.addRequiredParam<MaterialPropertyName>("post_deform_grad_name",
                                                "Name of adjusted deformation gradient variable");
  return params;
}

ComputeVolumetricDeformGrad::ComputeVolumetricDeformGrad(const InputParameters & parameters)
  : DerivativeMaterialInterface<Material>(parameters),
    _pre_deform_grad(getMaterialProperty<RankTwoTensor>("pre_deform_grad_name")),
    _volumetric_deform_grad(declareProperty<RankTwoTensor>(
        getParam<MaterialPropertyName>("volumetric_deform_grad_name"))),
    _post_deform_grad(
        declareProperty<RankTwoTensor>(getParam<MaterialPropertyName>("post_deform_grad_name")))
{
}

void
ComputeVolumetricDeformGrad::initQpStatefulProperties()
{
  _post_deform_grad[_qp].setToIdentity();
  _volumetric_deform_grad[_qp].setToIdentity();
}

void
ComputeVolumetricDeformGrad::computeQpProperties()
{
  createVolumetricDeformGrad();
  _post_deform_grad[_qp] = _volumetric_deform_grad[_qp].inverse() * _pre_deform_grad[_qp];
}

void
ComputeVolumetricDeformGrad::createVolumetricDeformGrad()
{
  _volumetric_deform_grad[_qp].setToIdentity();
}