qtruss1d.C

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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
 */
 
#include "sm/Elements/Bars/qtruss1d.h"
#include "fei1dquad.h"
#include "crosssection.h"
#include "gausspoint.h"
#include "gaussintegrationrule.h"
#include "floatmatrix.h"
#include "floatarray.h"
#include "intarray.h"
#include "sm/CrossSections/structuralcrosssection.h"
#include "mathfem.h"
#include "classfactory.h"
 
#ifdef __OOFEG
 #include "oofeggraphiccontext.h"
#endif
 
namespace oofem {
REGISTER_Element(QTruss1d);
 
FEI1dQuad QTruss1d::interpolation(1);
 
QTruss1d::QTruss1d(int n, Domain *aDomain) : NLStructuralElement(n, aDomain)
{
    numberOfDofMans = 3;
}
 
void
QTruss1d::giveDofManDofIDMask(int inode, IntArray &answer) const
{
    answer = { D_u };
}
 
int
QTruss1d::computeGlobalCoordinates(FloatArray &answer, const FloatArray &lcoords)
{
    this->interpolation.local2global(answer, lcoords, FEIElementGeometryWrapper(this) );
    return 1;
}
 
void
QTruss1d::computeStressVector(FloatArray &answer, const FloatArray &strain, GaussPoint *gp, TimeStep *tStep)
{
    answer = this->giveStructuralCrossSection()->giveRealStress_1d(strain, gp, tStep);
}
 
void
QTruss1d::computeConstitutiveMatrixAt(FloatMatrix &answer, MatResponseMode rMode, GaussPoint *gp, TimeStep *tStep)
{
    answer = this->giveStructuralCrossSection()->giveStiffnessMatrix_1d(rMode, gp, tStep);
}
 
void
QTruss1d::computeConstitutiveMatrix_dPdF_At(FloatMatrix &answer, MatResponseMode rMode, GaussPoint *gp, TimeStep *tStep)
{
    answer = this->giveStructuralCrossSection()->giveStiffnessMatrix_dPdF_1d(rMode, gp, tStep);
}
 
double
QTruss1d::computeVolumeAround(GaussPoint *gp)
// Returns the length of the receiver. This method is valid only if 1
// Gauss point is used.
{
    double detJ = fabs(this->interpolation.giveTransformationJacobian(gp->giveNaturalCoordinates(), FEIElementGeometryWrapper(this) ) );
    double weight  = gp->giveWeight();
    return detJ * weight * this->giveCrossSection()->give(CS_Area, gp);
}
 
 
void QTruss1d::computeGaussPoints()
// Sets up the array of Gauss Points of the receiver.XF
{
    if ( integrationRulesArray.size() == 0 ) {
        integrationRulesArray.resize(1);
        integrationRulesArray [ 0 ] = std::make_unique< GaussIntegrationRule >(1, this, 1, 3);
        this->giveCrossSection()->setupIntegrationPoints(* integrationRulesArray [ 0 ], numberOfGaussPoints, this);
    }
}
 
void
QTruss1d::computeBmatrixAt(GaussPoint *gp, FloatMatrix &answer, int li, int ui)
{
    this->interpolation.evaldNdx(answer, gp->giveNaturalCoordinates(), FEIElementGeometryWrapper(this) );
}
 
void
QTruss1d::computeBHmatrixAt(GaussPoint *gp, FloatMatrix &answer)
{
    this->computeBmatrixAt(gp, answer);
}
} // end namespace oofem