B31.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 B31_H
#define B31_H
 
#include <Element/SectionElement.h>
#include <Element/Utility/Orientation.h>
 
class B31 final : public SectionElement3D {
    struct IntegrationPoint final {
        double coor, weight;
        unique_ptr<Section> b_section;
        mat strain_mat; // axial strain, curvature about the z-axis (major), curvature about the y-axis (minor)
        IntegrationPoint(double, double, unique_ptr<Section>&&);
    };
 
    static constexpr unsigned b_node = 2, b_dof = 6, b_size = b_dof * b_node;
 
    static const span b_span;
 
    const unsigned orientation_tag, int_pt_num;
 
    const double length = 0., torsion_stiff = 0.;
 
    vector<IntegrationPoint> int_pt;
 
    unique_ptr<Orientation> b_trans;
 
public:
    B31(
        unsigned,     // tag
        uvec&&,       // node tags
        unsigned,     // section tag
        unsigned,     // orientation tag
        unsigned = 6, // integration points
        bool = false  // nonlinear geometry switch
    );
 
    int initialize(const shared_ptr<DomainBase>&) override;
 
    int update_status() override;
 
    int commit_status() override;
    int clear_status() override;
    int reset_status() override;
 
    vector<vec> record(OutputType) override;
 
    void print() override;
 
#ifdef SUANPAN_VTK
    void Setup() override;
    void GetData(vtkSmartPointer<vtkDoubleArray>&, OutputType) override;
    void SetDeformation(vtkSmartPointer<vtkPoints>&, double) override;
#endif
};
 
#endif