GeneralizedKelvinVoigtModel.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 "GeneralizedKelvinVoigtBase.h"
#include <optional>
 
class GeneralizedKelvinVoigtModel : public GeneralizedKelvinVoigtBase
{
public:
  static InputParameters validParams();
 
  GeneralizedKelvinVoigtModel(const InputParameters & parameters);
 
protected:
  virtual void computeQpViscoelasticProperties();
  virtual void computeQpViscoelasticPropertiesInv();
 
  RankFourTensor _C0;
  std::vector<RankFourTensor> _Ci;
  std::vector<Real> _eta_i;
 
  RankFourTensor _S0;
  std::vector<RankFourTensor> _Si;
 
  std::optional<RankFourTensor> _C_longterm;
  std::optional<RankFourTensor> _S_longterm;
};