prescribedgradientbcneumann.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 PRESCRIBEDGRADIENTBCNEUMANN_H_
#define PRESCRIBEDGRADIENTBCNEUMANN_H_
 
#include "prescribedgradienthomogenization.h"
#include "activebc.h"
 
#include <memory>
 
#define _IFT_PrescribedGradientBCNeumann_Name   "prescribedgradientbcneumann"
 
namespace oofem {
class Node;
class Element;
class OOFEM_EXPORT PrescribedGradientBCNeumann : public ActiveBoundaryCondition, public PrescribedGradientHomogenization
{
public:
    PrescribedGradientBCNeumann(int n, Domain *d);
    virtual ~PrescribedGradientBCNeumann();
 
    int giveNumberOfInternalDofManagers() override { return 1; }
    DofManager *giveInternalDofManager(int i) override;
 
    void initializeFrom(InputRecord &ir) override;
    void giveInputRecord(DynamicInputRecord &input) override;
 
    bcType giveType() const override { return UnknownBT; }
 
    void scale(double s) override;
 
    void assembleVector(FloatArray &answer, TimeStep *tStep,
                        CharType type, ValueModeType mode,
                        const UnknownNumberingScheme &s, FloatArray *eNorm=nullptr, void* lock=nullptr) override;
 
    void assemble(SparseMtrx &answer, TimeStep *tStep,
                  CharType type, const UnknownNumberingScheme &r_s, const UnknownNumberingScheme &c_s, 
                  double scale = 1.0, void* lock=nullptr) override;
 
    void giveLocationArrays(std :: vector< IntArray > &rows, std :: vector< IntArray > &cols, CharType type,
                            const UnknownNumberingScheme &r_s, const UnknownNumberingScheme &c_s) override;
 
    const char *giveClassName() const override { return "PrescribedGradientBCNeumann"; }
    const char *giveInputRecordName() const override { return _IFT_PrescribedGradientBCNeumann_Name; }
 
    void computeField(FloatArray &sigma, TimeStep *tStep) override;
    void computeTangent(FloatMatrix &tangent, TimeStep *tStep) override;
 
    void giveStressLocationArray(IntArray &oCols, const UnknownNumberingScheme &r_s);
 
protected:
    std :: unique_ptr< Node > mpSigmaHom;
    IntArray mSigmaIds;

    void integrateTangent(FloatMatrix &oTangent, Element *e, int iBndIndex);
};
} /* namespace oofem */
 
#endif /* PRESCRIBEDGRADIENTBCNEUMANN_H_ */