NonlinearNM.h

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/*******************************************************************************
 * Copyright (C) 2017-2024 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 NONLINEARNM_H
#define NONLINEARNM_H
 
#include "SectionNM.h"
 
struct DataNonlinearNM {
    const double EA, EIS, EIW;
    const vec yield_force;
};
 
class NonlinearNM : protected DataNonlinearNM, public SectionNM {
    [[nodiscard]] virtual int compute_local_integration(vec&, mat&) = 0;
 
protected:
    static constexpr unsigned max_iteration = 20u;
 
    const vec yield_diag;
 
    const mat ti, tj;
 
    const bool has_kinematic;
 
    const unsigned n_size;                        // nodal dof size
    const unsigned d_size = 2llu * n_size - 1llu; // element dof size
    const unsigned g_size;                        // global jacobian size
 
    const uvec ni, nj, ga, gb, gc, gd, ge;
 
    [[nodiscard]] virtual vec compute_h(double) const = 0;
    [[nodiscard]] virtual vec compute_dh(double) const = 0;
 
    [[nodiscard]] virtual double compute_f(const vec&, const vec&) const = 0;
    [[nodiscard]] virtual vec compute_df(const vec&, const vec&) const = 0;
    [[nodiscard]] virtual mat compute_ddf(const vec&, const vec&) const = 0;
 
public:
    NonlinearNM(
        unsigned, // tag
        double,   // axial rigidity
        double,   // flexural rigidity
        bool,     // kinematic hardening modulus
        double,   // linear density
        vec&&
    );
    NonlinearNM(
        unsigned, // tag
        double,   // axial rigidity
        double,   // flexural rigidity
        double,   // flexural rigidity
        bool,     // kinematic hardening modulus
        double,   // linear density
        vec&&
    );
 
    int initialize(const shared_ptr<DomainBase>&) override;
 
    int update_trial_status(const vec&) override;
 
    vector<vec> record(OutputType) override;
};
 
#endif