strainvector.h

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/*
 *
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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 strainvector_h
#define strainvector_h
 
#include "stressstrainbasevector.h"
 
namespace oofem {
class StressVector;
class OOFEM_EXPORT StrainVector : public StressStrainBaseVector
{
public:
    StrainVector(MaterialMode);
    StrainVector(const FloatArray &, MaterialMode);
    ~StrainVector() { }

    void computePrincipalValues(FloatArray &answer) const override;
    void computePrincipalValDir(FloatArray &answer, FloatMatrix &dir) const override;
    void computeMaxPrincipalDir(FloatArray &answer) const;
    void computeDeviatoricVolumetricSplit(StrainVector &answer, double &vol) const;
    void computeDeviatoricVolumetricSum(StrainVector &answer, const double vol) const;
    void printYourself() const override;
    double computeVolumeChange() const;
    double computeStrainNorm() const;
    void applyElasticStiffness(StressVector &stress, const double EModulus, const double nu) const;
    void applyDeviatoricElasticStiffness(StressVector &stress, const double EModulus, const double nu) const;
    void applyDeviatoricElasticStiffness(StressVector &stress, const double GModulus) const;
 
protected:
 
    void giveTranformationMtrx(FloatMatrix &answer, const FloatMatrix &base,
                               int transpose = 0) const override;
};
} // end namespace oofem
#endif // strainvector_h