j2mat.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 j2mat_h
#define j2mat_h
 
#include "sm/Materials/ConcreteMaterials/mplasticmaterial2.h"


#define _IFT_J2Mat_Name "j22mat"
#define _IFT_J2Mat_ry "ry"
#define _IFT_J2Mat_khm "khm"
#define _IFT_J2Mat_ihm "ihm"
#define _IFT_J2Mat_rma "rma"
 
namespace oofem {
class Domain;

class J2Mat : public MPlasticMaterial2
{
protected:
    int kinematicHardeningFlag = 0, isotropicHardeningFlag = 0;
    double kinematicModuli = 0., isotropicModuli = 0.;
    double k = 0.;
 
public:
    J2Mat(int n, Domain * d);
 
    void initializeFrom(InputRecord &ir) override;
    const char *giveInputRecordName() const override { return _IFT_J2Mat_Name; }
    const char *giveClassName() const override { return "J2Mat"; }
 
    int giveSizeOfFullHardeningVarsVector() const override;
    int giveSizeOfReducedHardeningVarsVector(GaussPoint *gp) const override;
    bool isCharacteristicMtrxSymmetric(MatResponseMode rMode) const override { return false; }
 
    std::unique_ptr<MaterialStatus> CreateStatus(GaussPoint *gp) const override;
 
protected:
    int giveMaxNumberOfActiveYieldConds(GaussPoint *gp) const override { return 2; }
 
    double computeYieldValueAt(GaussPoint *gp, int isurf, const FloatArray &stressVector,
                               const FloatArray &strainSpaceHardeningVars) const override;
 
    void computeStressGradientVector(FloatArray &answer, functType ftype, int isurf, GaussPoint *gp,
                                     const FloatArray &stressVector, const FloatArray &strainSpaceHardeningVars) const override;
 
    void computeStrainHardeningVarsIncrement(FloatArray &answer, GaussPoint *gp,
                                             const FloatArray &stress, const FloatArray &dlambda,
                                             const FloatArray &dplasticStrain, const IntArray &activeConditionMap) const override;
    void computeKGradientVector(FloatArray &answer, functType ftype, int isurf, GaussPoint *gp, FloatArray &fullStressVector,
                                const FloatArray &strainSpaceHardeningVariables) const override;
 
    void computeReducedHardeningVarsSigmaGradient(FloatMatrix &answer, GaussPoint *gp, const IntArray &activeConditionMap,
                                                  const FloatArray &fullStressVector,
                                                  const FloatArray &strainSpaceHardeningVars,
                                                  const FloatArray &gamma) const override;
    void computeReducedHardeningVarsLamGradient(FloatMatrix &answer, GaussPoint *gp, int actSurf,
                                                const IntArray &activeConditionMap,
                                                const FloatArray &fullStressVector,
                                                const FloatArray &strainSpaceHardeningVars,
                                                const FloatArray &gamma) const override;
    int hasHardening() const override;
 
    void  computeReducedSSGradientMatrix(FloatMatrix &gradientMatrix,  int i, GaussPoint *gp, const FloatArray &fullStressVector,
                                         const FloatArray &strainSpaceHardeningVariables) const override;
    void  computeReducedSKGradientMatrix(FloatMatrix &gradientMatrix,  int i, GaussPoint *gp, const FloatArray &fullStressVector,
                                         const FloatArray &strainSpaceHardeningVariables) const override;
 
    // auxiliary function
    static double computeJ2InvariantAt(const FloatArray &stressVector);
    double giveIsotropicHardeningVar(GaussPoint *gp, const FloatArray &strainSpaceHardeningVars) const;
    void giveStressBackVector(FloatArray &answer, GaussPoint *gp, const FloatArray &strainSpaceHardeningVars) const;
};
} // end namespace oofem
#endif // j2mat_h