BilinearCC.h

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/*******************************************************************************
 * Copyright (C) 2017-2025 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 BILINEARCC_H
#define BILINEARCC_H
 
#include "NonlinearCamClay.h"
 
struct DataBilinearCC {
    const double a, a_slope;
};
 
class BilinearCC final : protected DataBilinearCC, public NonlinearCamClay {
    [[nodiscard]] double compute_a(double) const override;
    [[nodiscard]] double compute_da(double) const override;
 
public:
    BilinearCC(
        unsigned,   // tag
        double,     // elastic modulus
        double,     // poisson's ratio
        double,     // beta
        double,     // m
        double,     // pt
        double,     // a
        double,     // a_slope
        double = 0. // density
    );
 
    unique_ptr<Material> get_copy() override;
 
    void print() override;
};
 
#endif