ADMultiplePowerLawCreepStressUpdate.h

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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
 
#pragma once
 
#include "RadialReturnCreepStressUpdateBase.h"
 
class ADMultiplePowerLawCreepStressUpdate : public ADRadialReturnCreepStressUpdateBase
{
public:
  static InputParameters validParams();
 
  ADMultiplePowerLawCreepStressUpdate(const InputParameters & parameters);
 
  virtual Real
  computeStrainEnergyRateDensity(const ADMaterialProperty<RankTwoTensor> & stress,
                                 const ADMaterialProperty<RankTwoTensor> & strain_rate) override;
 
  virtual bool substeppingCapabilityEnabled() override;
 
protected:
  virtual void computeStressInitialize(const ADReal & effective_trial_stress,
                                       const ADRankFourTensor & elasticity_tensor) override;
  virtual ADReal computeResidual(const ADReal & effective_trial_stress,
                                 const ADReal & scalar) override;
  virtual ADReal computeDerivative(const ADReal & effective_trial_stress,
                                   const ADReal & scalar) override;
 
  std::size_t stressIndex(const ADReal & effective_trial_stress);
 
  const ADVariableValue * const _temperature;
 
  const std::vector<Real> _coefficient;
 
  const std::vector<Real> _n_exponent;
 
  const std::vector<Real> _m_exponent;
 
  const std::vector<Real> _stress_thresholds;
 
  const std::vector<Real> _activation_energy;
 
  const Real _gas_constant;
 
  const Real _start_time;
 
  ADReal _exponential;
 
  Real _exp_time;
 
  unsigned int _stress_index;
 
  const unsigned int _number_of_models;
};