ConcreteCM.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 CONCRETECM_H
#define CONCRETECM_H
 
#include <Material/Material1D/Hysteresis/ComplexHysteresis.h>
 
class ConcreteCM final : public ComplexHysteresis {
    const double c_stress, c_strain, t_stress, t_strain;
 
    const double c_m, c_n, t_m, t_n;
 
    const bool linear_trans;
 
    [[nodiscard]] podarray<double> compute_compression_backbone(double) override;
    [[nodiscard]] podarray<double> compute_tension_backbone(double) override;
    [[nodiscard]] podarray<double> compute_compression_unload(double) override;
    [[nodiscard]] podarray<double> compute_tension_unload(double) override;
    [[nodiscard]] podarray<double> compute_compression_reload(double) override;
    [[nodiscard]] podarray<double> compute_tension_reload(double) override;
    [[nodiscard]] podarray<double> compute_compression_subunload(double) override;
    [[nodiscard]] podarray<double> compute_tension_subunload(double) override;
    [[nodiscard]] podarray<double> compute_transition(double, double, double, double, double, double, double) const;
 
    void update_compression_unload(double) override;
    void update_tension_unload(double) override;
    void update_connect();
 
public:
    ConcreteCM(
        unsigned,       // tag
        double,         // elastic modulus
        double,         // peak stress in negative
        double,         // crack stress in positive
        double,         // NC
        double,         // NT
        double = -2E-3, // peak strain in negative
        double = 1E-4,  // crack strain in positive
        bool = false,   // if to use linear transition
        double = 0.     // density
    );
 
    unique_ptr<Material> get_copy() override;
 
    [[nodiscard]] double get_parameter(ParameterType) const override;
 
    void print() override;
};
 
#endif