RadialReturnStressUpdate.C

Go to the documentation of this file.

 
//* 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 "RadialReturnStressUpdate.h"
 
#include "MooseMesh.h"
#include "ElasticityTensorTools.h"
 
template <bool is_ad>
InputParameters
RadialReturnStressUpdateTempl<is_ad>::validParams()
{
  InputParameters params = StressUpdateBaseTempl<is_ad>::validParams();
  params.addClassDescription("Calculates the effective inelastic strain increment required to "
                             "return the isotropic stress state to a J2 yield surface.  This class "
                             "is intended to be a parent class for classes with specific "
                             "constitutive models.");
  params += SingleVariableReturnMappingSolutionTempl<is_ad>::validParams();
  params.addParam<Real>("max_inelastic_increment",
                        1e-4,
                        "The maximum inelastic strain increment allowed in a time step");
  params.addRequiredParam<std::string>(
      "effective_inelastic_strain_name",
      "Name of the material property that stores the effective inelastic strain");
  params.addParam<bool>("use_substep", false, "Whether to use substepping");
 
  MooseEnum substeppingType("NONE ERROR_BASED INCREMENT_BASED", "NONE");
  substeppingType.addDocumentation("NONE", "Do not use substepping");
  substeppingType.addDocumentation(
      "ERROR_BASED",
      "Use substepping with a substep size that will yield, at most, the creep numerical "
      "integration error given by substep_strain_tolerance.");
  substeppingType.addDocumentation(
      "INCREMENT_BASED",
      "Use substepping with a substep size that will keep each inelastic strain increment below "
      "the maximum inelastic strain increment allowed in a time step.");
  params.addParam<MooseEnum>(
      "use_substepping", substeppingType, "Whether and how to use substepping");
  params.addParam<bool>(
      "adaptive_substepping",
      false,
      "Use adaptive substepping, where the number of substeps is successively doubled until the "
      "return mapping model successfully converges or the maximum number of substeps is reached. ");
 
  params.addDeprecatedParam<bool>(
      "use_substep", false, "Whether to use substepping", "Use `use_substepping` instead");
  params.addParam<Real>("substep_strain_tolerance",
                        0.1,
                        "Maximum ratio of the initial elastic strain increment at start of the "
                        "return mapping solve to the maximum inelastic strain allowable in a "
                        "single substep. Reduce this value to increase the number of substeps");
  params.addParam<bool>("apply_strain", true, "Flag to apply strain. Used for testing.");
  params.addParamNamesToGroup(
      "effective_inelastic_strain_name substep_strain_tolerance apply_strain", "Advanced");
  params.addParam<bool>("use_substep_integration_error",
                        false,
                        "If true, it establishes a substep size that will yield, at most,"
                        "the creep numerical integration error given by substep_strain_tolerance.");
  params.addParam<unsigned>("maximum_number_substeps",
                            25,
                            "The maximum number of substeps allowed before cutting the time step.");
  return params;
}
 
template <bool is_ad>
RadialReturnStressUpdateTempl<is_ad>::RadialReturnStressUpdateTempl(
    const InputParameters & parameters)
  : StressUpdateBaseTempl<is_ad>(parameters),
    SingleVariableReturnMappingSolutionTempl<is_ad>(parameters),
    _effective_inelastic_strain(this->template declareGenericProperty<Real, is_ad>(
        this->_base_name +
        this->template getParam<std::string>("effective_inelastic_strain_name"))),
    _effective_inelastic_strain_old(this->template getMaterialPropertyOld<Real>(
        this->_base_name +
        this->template getParam<std::string>("effective_inelastic_strain_name"))),
    _max_inelastic_increment(this->template getParam<Real>("max_inelastic_increment")),
    _substep_tolerance(this->template getParam<Real>("substep_strain_tolerance")),
    _identity_two(RankTwoTensor::initIdentity),
    _identity_symmetric_four(RankFourTensor::initIdentitySymmetricFour),
    _deviatoric_projection_four(_identity_symmetric_four -
                                _identity_two.outerProduct(_identity_two) / 3.0),
    _apply_strain(this->template getParam<bool>("apply_strain")),
    _use_substepping(
        this->template getParam<MooseEnum>("use_substepping").template getEnum<SubsteppingType>()),
    _adaptive_substepping(this->template getParam<bool>("adaptive_substepping")),
    _maximum_number_substeps(this->template getParam<unsigned>("maximum_number_substeps"))
{
  if (this->_pars.isParamSetByUser("use_substep"))
  {
    if (this->_pars.isParamSetByUser("use_substepping"))
      this->paramError("use_substep",
                       "Remove this parameter and just keep `use_substepping` in the input");
 
    if (parameters.get<bool>("use_substep"))
    {
      if (parameters.get<bool>("use_substep_integration_error"))
        _use_substepping = SubsteppingType::ERROR_BASED;
      else
        _use_substepping = SubsteppingType::INCREMENT_BASED;
    }
  }
 
  if (this->_pars.isParamSetByUser("maximum_number_substeps") &&
      _use_substepping == SubsteppingType::NONE)
    this->paramError(
        "maximum_number_substeps",
        "The parameter maximum_number_substeps can only be used when the substepping option "
        "(use_substepping) is not set to NONE");
 
  if (_adaptive_substepping && _use_substepping == SubsteppingType::NONE)
    this->paramError(
        "adaptive_substepping",
        "The parameter adaptive_substepping can only be used when the substepping option "
        "(use_substepping) is not set to NONE");
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::initQpStatefulProperties()
{
  _effective_inelastic_strain[_qp] = 0.0;
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::computeStressInitialize(
    const GenericReal<is_ad> & /*effective_trial_stress*/,
    const GenericRankFourTensor<is_ad> & elasticity_tensor)
{
  // Set the value of 3 * shear modulus for use as a reference residual value
  _three_shear_modulus = 3.0 * ElasticityTensorTools::getIsotropicShearModulus(elasticity_tensor);
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::propagateQpStatefulPropertiesRadialReturn()
{
  _effective_inelastic_strain[_qp] = _effective_inelastic_strain_old[_qp];
}
 
template <bool is_ad>
int
RadialReturnStressUpdateTempl<is_ad>::calculateNumberSubsteps(
    const GenericRankTwoTensor<is_ad> & strain_increment)
{
  // compute an effective elastic strain measure
  const GenericReal<is_ad> contracted_elastic_strain =
      strain_increment.doubleContraction(strain_increment);
  const Real effective_elastic_strain =
      std::sqrt(3.0 / 2.0 * MetaPhysicL::raw_value(contracted_elastic_strain));
 
  if (MooseUtils::absoluteFuzzyEqual(effective_elastic_strain, 0.0))
    return 1;
 
  if (_use_substepping == SubsteppingType::INCREMENT_BASED)
  {
    const Real ratio = effective_elastic_strain / _max_inelastic_increment;
 
    if (ratio > _substep_tolerance)
      return std::ceil(ratio / _substep_tolerance);
    return 1;
  }
 
  if (_use_substepping == SubsteppingType::ERROR_BASED)
  {
    const Real accurate_time_step_ratio = _substep_tolerance / effective_elastic_strain;
 
    if (accurate_time_step_ratio < 1.0)
      return std::ceil(1.0 / accurate_time_step_ratio);
    return 1;
  }
 
  mooseError("calculateNumberSubsteps should not have been called. Notify a developer.");
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::computeTangentOperator(Real /*effective_trial_stress*/,
                                                             const RankTwoTensor & /*stress_new*/,
                                                             RankFourTensor & /*tangent_operator*/)
{
  mooseError("computeTangentOperator called: no tangent computation is needed for AD");
}
 
template <>
void
RadialReturnStressUpdateTempl<false>::computeTangentOperator(Real effective_trial_stress,
                                                             const RankTwoTensor & stress_new,
                                                             RankFourTensor & tangent_operator)
{
  if (getTangentCalculationMethod() == TangentCalculationMethod::PARTIAL)
  {
    if (MooseUtils::absoluteFuzzyEqual(_effective_inelastic_strain_increment, 0.0))
      tangent_operator.zero();
    else
    {
      // mu = _three_shear_modulus / 3.0;
      // norm_dev_stress = ||s_n+1||
      // effective_trial_stress = von mises trial stress = std::sqrt(3.0 / 2.0) * ||s_n+1^trial||
      // scalar_effective_inelastic_strain = Delta epsilon^cr_n+1
      // deriv = derivative of scalar_effective_inelastic_strain w.r.t. von mises stress
      // deriv = std::sqrt(3.0 / 2.0) partial Delta epsilon^cr_n+1n over partial ||s_n+1^trial||
 
      mooseAssert(_three_shear_modulus != 0.0, "Shear modulus is zero");
 
      const RankTwoTensor deviatoric_stress = stress_new.deviatoric();
      const Real norm_dev_stress_squared = deviatoric_stress.doubleContraction(deviatoric_stress);
      if (MooseUtils::absoluteFuzzyEqual(norm_dev_stress_squared, 0.0))
      {
        tangent_operator.zero();
        return;
      }
      const Real norm_dev_stress = std::sqrt(norm_dev_stress_squared);
 
      const RankTwoTensor flow_direction = deviatoric_stress / norm_dev_stress;
      const RankFourTensor flow_direction_dyad = flow_direction.outerProduct(flow_direction);
      const Real deriv =
          computeStressDerivative(effective_trial_stress, _effective_inelastic_strain_increment);
      const Real scalar_one = _three_shear_modulus * _effective_inelastic_strain_increment /
                              std::sqrt(1.5) / norm_dev_stress;
 
      tangent_operator = scalar_one * _deviatoric_projection_four +
                         (_three_shear_modulus * deriv - scalar_one) * flow_direction_dyad;
    }
  }
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::updateState(
    GenericRankTwoTensor<is_ad> & strain_increment,
    GenericRankTwoTensor<is_ad> & inelastic_strain_increment,
    const GenericRankTwoTensor<is_ad> & /*rotation_increment*/,
    GenericRankTwoTensor<is_ad> & stress_new,
    const RankTwoTensor & /*stress_old*/,
    const GenericRankFourTensor<is_ad> & elasticity_tensor,
    const RankTwoTensor & elastic_strain_old,
    bool compute_full_tangent_operator,
    RankFourTensor & tangent_operator)
{
  using std::sqrt;
 
  // compute the deviatoric trial stress and trial strain from the current intermediate
  // configuration
  GenericRankTwoTensor<is_ad> deviatoric_trial_stress = stress_new.deviatoric();
 
  // compute the effective trial stress
  GenericReal<is_ad> dev_trial_stress_squared =
      deviatoric_trial_stress.doubleContraction(deviatoric_trial_stress);
  GenericReal<is_ad> effective_trial_stress = MetaPhysicL::raw_value(dev_trial_stress_squared)
                                                  ? sqrt(3.0 / 2.0 * dev_trial_stress_squared)
                                                  : 0.0;
 
  computeStressInitialize(effective_trial_stress, elasticity_tensor);
 
  mooseAssert(
      _three_shear_modulus != 0.0,
      "Shear modulus is zero. Ensure that the base class computeStressInitialize() is called.");
 
  // Use Newton iteration to determine the scalar effective inelastic strain increment
  _effective_inelastic_strain_increment = 0.0;
  if (!MooseUtils::absoluteFuzzyEqual(effective_trial_stress, 0.0))
  {
    this->returnMappingSolve(
        effective_trial_stress, _effective_inelastic_strain_increment, this->_console);
    if (_effective_inelastic_strain_increment != 0.0)
      inelastic_strain_increment =
          deviatoric_trial_stress *
          (1.5 * _effective_inelastic_strain_increment / effective_trial_stress);
    else
      inelastic_strain_increment.zero();
  }
  else
    inelastic_strain_increment.zero();
 
  if (_apply_strain)
  {
    strain_increment -= inelastic_strain_increment;
    updateEffectiveInelasticStrain(_effective_inelastic_strain_increment);
 
    // Use the old elastic strain here because we require tensors used by this class
    // to be isotropic and this method natively allows for changing in time
    // elasticity tensors
    stress_new = elasticity_tensor * (strain_increment + elastic_strain_old);
  }
 
  computeStressFinalize(inelastic_strain_increment);
 
  if constexpr (!is_ad)
  {
    if (compute_full_tangent_operator)
      computeTangentOperator(effective_trial_stress, stress_new, tangent_operator);
  }
  else
  {
    libmesh_ignore(compute_full_tangent_operator);
    libmesh_ignore(tangent_operator);
  }
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::updateStateSubstepInternal(
    GenericRankTwoTensor<is_ad> & strain_increment,
    GenericRankTwoTensor<is_ad> & inelastic_strain_increment,
    const GenericRankTwoTensor<is_ad> & rotation_increment,
    GenericRankTwoTensor<is_ad> & stress_new,
    const RankTwoTensor & stress_old,
    const GenericRankFourTensor<is_ad> & elasticity_tensor,
    const RankTwoTensor & elastic_strain_old,
    unsigned int total_number_substeps,
    bool compute_full_tangent_operator,
    RankFourTensor & tangent_operator)
{
  using std::sqrt;
 
  // if only one substep is needed, then call the original update state method
  if (total_number_substeps == 1)
  {
    updateState(strain_increment,
                inelastic_strain_increment,
                rotation_increment,
                stress_new,
                stress_old,
                elasticity_tensor,
                elastic_strain_old,
                compute_full_tangent_operator,
                tangent_operator);
 
    this->storeIncrementalMaterialProperties(total_number_substeps);
    return;
  }
 
  if (total_number_substeps > _maximum_number_substeps)
    mooseException("The number of substeps computed exceeds 'maximum_number_substeps'.");
 
  // cut the original timestep
  _dt = _dt_original / total_number_substeps;
 
  // initialize the inputs
  const GenericRankTwoTensor<is_ad> strain_increment_per_step =
      strain_increment / total_number_substeps;
  GenericRankTwoTensor<is_ad> sub_stress_new = elasticity_tensor * elastic_strain_old;
  GenericRankTwoTensor<is_ad> sub_elastic_strain_old = elastic_strain_old;
 
  // clear the original inputs
  MathUtils::mooseSetToZero(strain_increment);
  MathUtils::mooseSetToZero(inelastic_strain_increment);
  MathUtils::mooseSetToZero(stress_new);
 
  GenericReal<is_ad> sub_effective_inelastic_strain_increment = 0.0;
  GenericRankTwoTensor<is_ad> sub_inelastic_strain_increment = inelastic_strain_increment;
 
  for (unsigned int step = 0; step < total_number_substeps; ++step)
  {
    // set up input for this substep
    GenericRankTwoTensor<is_ad> sub_strain_increment = strain_increment_per_step;
    sub_stress_new += elasticity_tensor * sub_strain_increment;
 
    Real effective_sub_stress_new;
    if constexpr (!is_ad)
    {
      // compute effective_sub_stress_new
      const RankTwoTensor deviatoric_sub_stress_new = sub_stress_new.deviatoric();
      const Real dev_sub_stress_new_squared =
          deviatoric_sub_stress_new.doubleContraction(deviatoric_sub_stress_new);
      effective_sub_stress_new = sqrt(3.0 / 2.0 * dev_sub_stress_new_squared);
    }
    else
      libmesh_ignore(effective_sub_stress_new);
 
    // update stress and strain based on the strain increment
    updateState(sub_strain_increment,
                sub_inelastic_strain_increment,
                rotation_increment, // not used in updateState
                sub_stress_new,
                stress_old, // not used in updateState
                elasticity_tensor,
                elastic_strain_old,
                false);
    // do not compute tangent until the end of this substep (or not at all for is_ad == true)
 
    // update strain and stress
    strain_increment += sub_strain_increment;
    inelastic_strain_increment += sub_inelastic_strain_increment;
    sub_elastic_strain_old += sub_strain_increment;
    sub_stress_new = elasticity_tensor * sub_elastic_strain_old;
 
    // accumulate scalar_effective_inelastic_strain
    sub_effective_inelastic_strain_increment += _effective_inelastic_strain_increment;
 
    if constexpr (!is_ad)
      computeTangentOperator(effective_sub_stress_new, sub_stress_new, tangent_operator);
 
    // store incremental material properties for this step
    this->storeIncrementalMaterialProperties(total_number_substeps);
  }
 
  // update stress
  stress_new = sub_stress_new;
 
  // update effective inelastic strain
  updateEffectiveInelasticStrain(sub_effective_inelastic_strain_increment);
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::updateStateSubstep(
    GenericRankTwoTensor<is_ad> & strain_increment,
    GenericRankTwoTensor<is_ad> & inelastic_strain_increment,
    const GenericRankTwoTensor<is_ad> & rotation_increment,
    GenericRankTwoTensor<is_ad> & stress_new,
    const RankTwoTensor & stress_old,
    const GenericRankFourTensor<is_ad> & elasticity_tensor,
    const RankTwoTensor & elastic_strain_old,
    bool compute_full_tangent_operator,
    RankFourTensor & tangent_operator)
{
  unsigned int num_substeps = calculateNumberSubsteps(strain_increment);
  _dt_original = _dt;
  while (true)
  {
    try
    {
      updateStateSubstepInternal(strain_increment,
                                 inelastic_strain_increment,
                                 rotation_increment,
                                 stress_new,
                                 stress_old,
                                 elasticity_tensor,
                                 elastic_strain_old,
                                 num_substeps,
                                 compute_full_tangent_operator,
                                 tangent_operator);
    }
    catch (MooseException & e)
    {
      // if we are not using adaptive substepping we just rethrow the exception
      if (!_adaptive_substepping)
        throw;
 
      // otherwise we double the number of substeps and try again
      num_substeps *= 2;
      if (num_substeps <= _maximum_number_substeps)
        continue;
 
      // too meany substeps, break out of the loop
      break;
    }
 
    // updateStateSubstepInternal was successful (didn't throw)
    _dt = _dt_original;
    return;
  }
 
  // recover the original timestep
  _dt = _dt_original;
 
  mooseException("Adaptive substepping failed. Maximum number of substeps exceeded.");
}
 
template <bool is_ad>
Real
RadialReturnStressUpdateTempl<is_ad>::computeReferenceResidual(
    const GenericReal<is_ad> & effective_trial_stress,
    const GenericReal<is_ad> & scalar_effective_inelastic_strain)
{
  return MetaPhysicL::raw_value(effective_trial_stress / _three_shear_modulus) -
         MetaPhysicL::raw_value(scalar_effective_inelastic_strain);
}
 
template <bool is_ad>
GenericReal<is_ad>
RadialReturnStressUpdateTempl<is_ad>::maximumPermissibleValue(
    const GenericReal<is_ad> & effective_trial_stress) const
{
  return effective_trial_stress / _three_shear_modulus;
}
 
template <bool is_ad>
Real
RadialReturnStressUpdateTempl<is_ad>::computeTimeStepLimit()
{
  const Real scalar_inelastic_strain_incr =
      std::abs(MetaPhysicL::raw_value(_effective_inelastic_strain[_qp]) -
               _effective_inelastic_strain_old[_qp]);
  if (!scalar_inelastic_strain_incr)
    return std::numeric_limits<Real>::max();
 
  return _dt * _max_inelastic_increment / scalar_inelastic_strain_incr;
}
 
template <bool is_ad>
void
RadialReturnStressUpdateTempl<is_ad>::outputIterationSummary(std::stringstream * iter_output,
                                                             const unsigned int total_it)
{
  if (iter_output)
  {
    *iter_output << "At element " << _current_elem->id() << " _qp=" << _qp << " Coordinates "
                 << _q_point[_qp] << " block=" << _current_elem->subdomain_id() << '\n';
  }
  SingleVariableReturnMappingSolutionTempl<is_ad>::outputIterationSummary(iter_output, total_it);
}
 
template class RadialReturnStressUpdateTempl<false>;
template class RadialReturnStressUpdateTempl<true>;