lattice2dboundary.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 lattice2dboundary_h
#define lattice2dboundary_h
 
#include "../sm/Elements/LatticeElements/lattice2d.h"


#define _IFT_Lattice2dBoundary_Name "latticeboundary2d"
#define _IFT_Lattice2dBoundary_location "location"
 
#define TOL 1.e-8
 
namespace oofem {
class ParamKey;
class Lattice2dBoundary : public Lattice2d
{
    /*
     *   This class implements a 2-dimensional lattice element for the
     *   boundaries of periodic cells. The theory for this element is
     *   described in the "P. Grassl and M. Jirásek. "Meso-scale approach
     *   to modelling the fracture process zone of concrete subjected to
     *   uniaxial tension". International Journal of Solids and Structures.
     *   Volume 47, Issues 7-8, pp. 957-968, 2010"
     *   The unknowns of the control node are Exx, Eyy and Gxy.
     *   Exx = axial strain x-direction
     *   Eyy = axial strain y-direction
     *   Gxy = 2Exy (assuming symmetry)
     */
protected:
    int location;
    static ParamKey IPK_Lattice2dBoundary_location;
 
public:
    Lattice2dBoundary(int, Domain *);                     // constructor
    ~Lattice2dBoundary();                                 // destructor
 
    void giveInternalForcesVector(FloatArray &answer,
                                  TimeStep *, int useUpdatedGpRecord = 0) override;
 
    const IntArray giveLocation() override;
 
    int            computeNumberOfDofs() override { return 9; }
    void giveDofManDofIDMask(int inode, IntArray &) const override;
    double        computeVolumeAround(GaussPoint *) override;
 
    //
    // definition & identification
    //
    const char *giveInputRecordName() const override { return _IFT_Lattice2dBoundary_Name; }
    const char *giveClassName() const override { return "Lattice2dBoundary"; }
    void initializeFrom(InputRecord &ir, int priority) override;
    void postInitialize() override;
 
    void saveContext(DataStream &stream, ContextMode mode) override;
    void restoreContext(DataStream &stream, ContextMode mode) override;
 
#ifdef __OOFEG
    void drawYourself(oofegGraphicContext &context, TimeStep *tStep) override;
    void drawRawGeometry(oofegGraphicContext &, TimeStep *tStep) override;
    void drawRawCrossSections(oofegGraphicContext &, TimeStep *tStep);
    void drawDeformedGeometry(oofegGraphicContext &,  TimeStep *tStep, UnknownType) override;
    void drawSpecial(oofegGraphicContext &gc, TimeStep *tStep) override;
    void giveCrossSectionCoordinates(FloatArray &coords) override;
#endif
 
 
protected:
    void computeBmatrixAt(GaussPoint *, FloatMatrix &, int = 1, int = ALL_STRAINS) override;
    bool computeGtoLRotationMatrix(FloatMatrix &) override;
 
    void computeStiffnessMatrix(FloatMatrix &answer, MatResponseMode rMode, TimeStep *tStep) override;
 
    void computeStrainVector(FloatArray &answer, GaussPoint *gp, TimeStep *stepN) override;
 
    double giveLength() override;
    double givePitch();
    void recalculateCoordinates(int nodeNumber, FloatArray &coords) override;
    void giveSwitches(FloatArray &answer);
};
} // end namespace oofem
 
#endif