NonlinearGurson1D.h

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/*******************************************************************************
 * Copyright (C) 2017-2022 Theodore Chang
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/
#ifndef NONLINEARGURSON1D_H
#define NONLINEARGURSON1D_H

#include <Material/Material1D/Material1D.h>

struct DataNonlinearGurson1D {
    const double elastic_modulus; // elastic modulus
    const double poissons_ratio;  // poisson's ratio

    const double q1 = 1., q2 = 1., fn = 0., sn = 1., en = 0.;
};

class NonlinearGurson1D : protected DataNonlinearGurson1D, public Material1D {
    static const unsigned max_iteration;

    const double bulk = elastic_modulus / (3. - 6. * poissons_ratio); // bulk modulus
    const double three_bulk = 3. * bulk;
    const double nine_bulk = 9. * bulk;

    const double para_b = fn / sn / sqrt(2. * datum::pi);

    [[nodiscard]] virtual vec compute_hardening(double) const = 0;

public:
    NonlinearGurson1D(unsigned,   // tag
                      double,     // elastic modulus
                      double,     // poisson's ratio
                      double,     // q1
                      double,     // q2
                      double,     // fn
                      double,     // sn
                      double,     // en
                      double = 0. // density
    );

    int initialize(const shared_ptr<DomainBase>&) override;

    [[nodiscard]] double get_parameter(ParameterType) const override;

    int update_trial_status(const vec&) override;

    int clear_status() override;
    int commit_status() override;
    int reset_status() override;

    vector<vec> record(OutputType) override;
};

#endif