quasicontinuum.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 quasicontinuum_h
#define quasicontinuum_h
 
#include "floatarray.h"
#include "element.h"
#include "node.h"
#include "qcnode.h"
 
namespace oofem {
class Quasicontinuum 
{
protected:
    std::vector<IntArray> interpolationMeshNodes;
    IntArray interpolationElementNumbers;
    IntArray interpolationElementIndices;
    std::vector<IntArray> connectivityTable;
    int nDimensions;
    IntArray elemList;
    IntArray nodeList;
 
public:
    Quasicontinuum();
    virtual ~Quasicontinuum();
 
    void setNoDimensions(Domain *d);
    void setupInterpolationMesh(Domain *d, int generateInterpolationElements, int interpolationElementsMaterialNumber, std::vector<IntArray> &newMeshNodes);
    void createInterpolationElements(Domain *d);
    void addCrosssectionToInterpolationElements(Domain *d);
 
    void applyApproach1(Domain *d);
    void applyApproach2(Domain *d, int homMtrxType, double volumeOfInterpolationMesh);
    void applyApproach3(Domain *d, int homMtrxType);
 
    void homogenizationOfStiffMatrix(double &homogenizedE, double &homogenizedNu, const FloatMatrix &Diso );
    void createGlobalStiffnesMatrix(FloatMatrix &Diso, double &S0, Domain *d, int homMtrxType,  double volumeOfInterpolationMesh);
 
    void computeStiffnessTensorOf1Link(FloatMatrix &D1, double &S0, Element *e, Domain *d);
    bool stiffnessAssignment( std::vector<FloatMatrix> &individualStiffnessTensors, FloatArray &individialS0, Domain *d, Element *e, qcNode *qn1, qcNode *qn2 );
 
    void computeIntersectionsOfLinkWithInterpElements( IntArray &intersected, std::vector<double> & lengths, Domain *d, Element *e, qcNode *qn1, qcNode *qn2);
    bool computeIntersectionsOfLinkWith2DTringleElements( IntArray &intersected, std::vector<double> &lengths, Domain *d, Element *e, qcNode *qn1, qcNode *qn2);
    bool computeIntersectionsOfLinkWith3DTetrahedraElements( IntArray &intersected, std::vector<double> &lengths, Domain *d, Element *e, qcNode *qn1, qcNode *qn2);
 
    void initializeConnectivityTableForInterpolationElements( Domain *d );
 
    bool intersectionTestSegmentTrianglePlucker3D(FloatArray &intersectCoords, const FloatArray &A, const FloatArray &B, const FloatArray &C, const FloatArray &X1, const FloatArray &X2 );
 
    int intersectionTestSegmentTetrahedra3D(std::vector<FloatArray> &intersectCoords, const FloatArray &A, const FloatArray &B, const FloatArray &C, const FloatArray &D, const FloatArray &X1, const FloatArray &X2 );
 
    bool intersectionTestSegmentSegment2D(FloatArray &intersectCoords, const FloatArray &A1, const FloatArray &A2, const FloatArray &B1, const FloatArray &B2 );
    
    int intersectionTestSegmentTriangle2D(std::vector<FloatArray> &intersectCoords, const FloatArray &A, const FloatArray &B, const FloatArray &C, const FloatArray &U1, const FloatArray &U2 );
 
    void transformStiffnessTensorToMatrix(FloatMatrix &matrix, const FloatMatrix &tensor );
};
} // end namespace oofem
#endif // quasicontinuum_h