WR2ImplicitExponentialTimeIntegration.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/models/Model.h"
 
namespace neml2
{
class Scalar;
class Rot;
class WR2;

// This function takes as input a skew tensor giving the spin and does the rotational update
class WR2ImplicitExponentialTimeIntegration : public Model
{
public:
  static OptionSet expected_options();
 
  WR2ImplicitExponentialTimeIntegration(const OptionSet & options);
 
protected:
  void set_value(bool out, bool dout_din, bool d2out_din2) override;

  const Variable<Rot> & _s;

  const Variable<Rot> & _sn;

  const Variable<WR2> & _rate;

  const Variable<Scalar> & _t;

  const Variable<Scalar> & _tn;

  Variable<Rot> & _r;
};
} // namespace neml2