nlstructuralelement.h

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/*
 *
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 *               ##   ##  ##   ##  ##      ##      ## ### ##
 *              ##   ##  ##   ##  ####    ####    ##  #  ##
 *             ##   ##  ##   ##  ##      ##      ##     ##
 *            ##   ##  ##   ##  ##      ##      ##     ##
 *            #####    #####   ##      ######  ##     ##
 *
 *
 *             OOFEM : Object Oriented Finite Element Code
 *
 *               Copyright (C) 1993 - 2025   Borek Patzak
 *
 *
 *
 *       Czech Technical University, Faculty of Civil Engineering,
 *   Department of Structural Mechanics, 166 29 Prague, Czech Republic
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef nlstructuralelement_h
#define nlstructuralelement_h
 
#include "sm/Elements/structuralelement.h"


#define _IFT_NLStructuralElement_nlgeoflag "nlgeo"
 
namespace oofem {
class TimeStep;
class Node;
class Material;
class GaussPoint;
class FloatMatrix;
class FloatArray;
class IntArray;
class ParamKey;

class NLStructuralElement : public StructuralElement
{
protected:
    int nlGeometry=0;
 
    static ParamKey IPK_NLStructuralElement_nlgeoflag;
public:
    NLStructuralElement(int n, Domain *d);
    virtual ~NLStructuralElement() { }

    int giveGeometryMode() { return nlGeometry; }

    void computeFirstPKStressVector(FloatArray &answer, GaussPoint *gp, TimeStep *tStep);

    void computeCauchyStressVector(FloatArray &answer, GaussPoint *gp, TimeStep *tStep);

    void computeStiffnessMatrix(FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep) override;
 
 

    void computeInitialStressMatrix(FloatMatrix &answer, TimeStep *tStep) override
    { OOFEM_ERROR("Method computeInitialStressMatrix is not implemented"); }

    void computeStiffnessMatrix_withIRulesAsSubcells(FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep);

 
    void giveInternalForcesVector(FloatArray &answer, TimeStep *tStep, int useUpdatedGpRecord = 0) override;

    virtual void computeConstitutiveMatrix_dPdF_At(FloatMatrix &answer,
                                                   MatResponseMode rMode, GaussPoint *gp,
                                                   TimeStep *tStep) = 0;
 

    void giveInternalForcesVector_withIRulesAsSubcells(FloatArray &answer, TimeStep *tStep, int useUpdatedGpRecord = 0) override;

    virtual void computeDeformationGradientVector(FloatArray &answer, GaussPoint *gp, TimeStep *tStep);

    double computeCurrentVolume(TimeStep *tStep);
 
    // data management
    void initializeFrom(InputRecord &ir, int priority) override;
    void giveInputRecord(DynamicInputRecord &input) override;
 
    // definition
    const char *giveClassName() const override { return "NLStructuralElement"; }
 
protected:
    int checkConsistency() override;
    virtual void computeBHmatrixAt(GaussPoint *gp, FloatMatrix &answer) {
        OOFEM_ERROR("method not implemented for this element");
        return;
    }
    friend class GradientDamageElement;
    friend class PhaseFieldElement;
    friend class XfemStructuralElementInterface;
};
} // end namespace oofem
#endif // nlstructuralelement_h