drucker_prager.h

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// ------------------------------------------------------
//
// SPDX-License-Identifier: GPL-2.0-or-later
//
// SPDX-FileCopyrightText: Copyright (C) 2015-2026 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_drucker_prager_h
#define _aspect_material_model_drucker_prager_h

#include <aspect/material_model/interface.h>
#include <aspect/material_model/rheology/drucker_prager.h>
#include <aspect/material_model/equation_of_state/linearized_incompressible.h>
#include <aspect/simulator_access.h>

namespace aspect
{
  namespace MaterialModel
  {
    template <int dim>
    class DruckerPrager : public MaterialModel::Interface<dim>, public ::aspect::SimulatorAccess<dim>
    {
      public:
        void evaluate(const MaterialModel::MaterialModelInputs<dim> &in,
                      MaterialModel::MaterialModelOutputs<dim> &out) const override;

        bool is_compressible () const override;
        static
        void
        declare_parameters (ParameterHandler &prm);

        void
        parse_parameters (ParameterHandler &prm) override;
      private:

        double reference_T;
        double thermal_conductivities;

        EquationOfState::LinearizedIncompressible<dim> equation_of_state;

        /*
         * Objects for computing plastic stresses, viscosities, and additional outputs
         */
        Rheology::DruckerPrager<dim> drucker_prager_plasticity;

        double angle_of_internal_friction;

        double cohesion;

        double minimum_viscosity;
        double maximum_viscosity;

        double reference_strain_rate;
    };

  }
}

#endif