RambergOsgood.h

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/*******************************************************************************
 * Copyright (C) 2017-2026 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 RAMBERGOSGOOD_H
#define RAMBERGOSGOOD_H
 
#include <Material/Material1D/Material1D.h>
 
struct DataRambergOsgood {
    const double elastic_modulus;
    const double yield_stress;
    const double offset, n;
};
 
class RambergOsgood final : protected DataRambergOsgood, public Material1D {
    static constexpr unsigned max_iteration = 20u;
 
    const double nm = n - 1.;
 
public:
    RambergOsgood(
        unsigned,     // tag
        double,       // elastic modulus
        double,       // yield stress
        double = 1.,  // offset
        double = 20., // n
        double = 0.   // density
    );
 
    int initialize(const shared_ptr<DomainBase>&) override;
 
    unique_ptr<Material> unique_copy() override;
 
    int update_trial_status(const vec&) override;
 
    int clear_status() override;
    int commit_status() override;
    int reset_status() override;
 
    void print() override;
};
 
#endif