maxwellChM.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 maxwellchm_h
#define maxwellchm_h
 
#include "rheoChM.h"
 
namespace oofem {
class MaxwellChainMaterialStatus : public RheoChainMaterialStatus
{
public:
    MaxwellChainMaterialStatus(GaussPoint *g, int nunits);
 
    void printOutputAt(FILE *file, TimeStep *tStep) const override;
 
    void initTempStatus() override;
    void updateYourself(TimeStep *tStep) override;
 
    void saveContext(DataStream &stream, ContextMode mode) override;
    void restoreContext(DataStream &stream, ContextMode mode) override;
 
    // definition
    const char *giveClassName() const override { return "MaxwellChainMaterialStatus"; }
};
 
 

class MaxwellChainMaterial : public RheoChainMaterial
{
public:
    MaxwellChainMaterial(int n, Domain *d);
 
    // overload thesse function such that computation of hidden vars can be done after the computation of stress
    void giveRealStressVector(FloatArray &answer, GaussPoint *gp, const FloatArray &reducedStrain, TimeStep *tStep) const override;
    void computeHiddenVars(GaussPoint *gp, TimeStep *tStep) const;
 
    // identification and auxiliary functions
    const char *giveClassName() const override { return "MaxwellChainMaterial"; }
    void initializeFrom(InputRecord &ir) override;
 
    void giveShrinkageStrainVector(FloatArray &answer,
                                   GaussPoint *gp,
                                   TimeStep *tStep,
                                   ValueModeType mode) const override
    { answer.clear(); }
 
    void giveEigenStrainVector(FloatArray &answer,
                               GaussPoint *gp, TimeStep *tStep, ValueModeType mode) const override;
 
    std::unique_ptr<MaterialStatus> CreateStatus(GaussPoint *gp) const override;
 
protected:
    bool hasIncrementalShrinkageFormulation() const override { return false; }
    FloatArray computeCharCoefficients(double tPrime, GaussPoint *gp, TimeStep *tStep) const override;
 
    double giveEModulus(GaussPoint *gp, TimeStep *tStep) const override;
    //    LinearElasticMaterial *giveLinearElasticMaterial();
};
} // end namespace oofem
#endif // maxwellchm_h