ImplicitUpdate.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
// OPEN SOURCE LICENSE (MIT)
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#pragma once
 
#include "neml2/models/Model.h"
#include "neml2/models/ModelNonlinearSystem.h"
#include "neml2/solvers/NonlinearSolver.h"
#include "neml2/models/Predictor.h"
 
namespace neml2
{
class ImplicitUpdate : public Model
{
public:
  static OptionSet expected_options();
 
  ImplicitUpdate(const OptionSet & options);
 
  void link_input_variables(Model * submodel) override;
 
  void to(const TensorOptions & options) override;
 
  std::size_t last_iterations() const { return _last_iterations; }
 
protected:
  void set_value(bool out, bool dout_din, bool d2out_din2) override;

  void apply_predictor();

  std::shared_ptr<ModelNonlinearSystem> _sys;

  std::shared_ptr<Model> _predictor;

  std::shared_ptr<NonlinearSolver> _solver;

  std::size_t _last_iterations = 0;
};
} // namespace neml2