friction_models.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2019-2026 by the ASPECT authors.
//
// This file is part of ASPECT.
//
// Detailed license information governing the source code and
// contributions can be found in the folder LICENSES and in
// LICENSE and CONTRIBUTING.md at the top level directory.
//
// ------------------------------------------------------

#ifndef _aspect_material_model_rheology_friction_models_h
#define _aspect_material_model_rheology_friction_models_h

#include <aspect/global.h>
#include <aspect/material_model/interface.h>
#include <aspect/simulator_access.h>
#include <deal.II/base/parsed_function.h>
#include <aspect/utilities.h>

#include <aspect/material_model/rheology/drucker_prager.h>
#include <deal.II/fe/component_mask.h>

namespace aspect
{
  namespace MaterialModel
  {
    namespace Rheology
    {
      enum FrictionMechanism
      {
        static_friction,
        dynamic_friction,
        function
      };

      template <int dim>
      class FrictionModels : public ::aspect::SimulatorAccess<dim>
      {
        public:
          static
          void
          declare_parameters (ParameterHandler &prm);

          void
          parse_parameters (ParameterHandler &prm);

          double
          compute_friction_angle(const double current_edot_ii,
                                 const unsigned int volume_fraction_index,
                                 const double static_friction_angle,
                                 const Point<dim> &position) const;

          FrictionMechanism
          get_friction_mechanism () const;

        private:
          FrictionMechanism friction_mechanism;

          std::vector<double> dynamic_angles_of_internal_friction;

          double dynamic_characteristic_strain_rate;

          double dynamic_friction_smoothness_exponent;

          std::unique_ptr<Functions::ParsedFunction<dim>> friction_function;

          Utilities::Coordinates::CoordinateSystem coordinate_system_friction_function;
      };
    }
  }
}
#endif