enrichmentfunction.h

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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 enrichmentfunction_h
#define enrichmentfunction_h
 
#include "intarray.h"
#include "femcmpnn.h"
 
#define _IFT_DiscontinuousFunction_Name "discontinuousfunction"
#define _IFT_HeavisideFunction_Name "heavisidefunction"
#define _IFT_RampFunction_Name "rampfunction"
 
namespace oofem {
class EnrichmentItem;
class EnrichmentDomain;
class BasicGeometry;
class GaussPoint;

class OOFEM_EXPORT EnrichmentFunction : public FEMComponent
{
protected:
    int numberOfDofs;
 
public:
    EnrichmentFunction(int n, Domain *aDomain) : FEMComponent(n, aDomain) { }
    virtual ~EnrichmentFunction() { }
 
    // New interface
    virtual void evaluateEnrFuncAt(double &oEnrFunc, const FloatArray &iPos, const double &iLevelSet) const = 0;
    virtual void evaluateEnrFuncDerivAt(FloatArray &oEnrFuncDeriv, const FloatArray &iPos, const double &iLevelSet, const FloatArray &iGradLevelSet) const = 0;

    virtual void giveJump(std :: vector< double > &oJumps) const = 0;
 
    void initializeFrom(InputRecord &ir) override;
    void giveInputRecord(DynamicInputRecord &input) override;
    const char *giveClassName() const override { return "EnrichmentFunction"; }
    int giveNumberOfDofs() const { return numberOfDofs; }
 
};

class OOFEM_EXPORT DiscontinuousFunction : public EnrichmentFunction
{
public:
    DiscontinuousFunction(int n, Domain *aDomain) : EnrichmentFunction(n, aDomain) {
        this->numberOfDofs = 1;
    }
 
    void evaluateEnrFuncAt(double &oEnrFunc, const FloatArray &iPos, const double &iLevelSet) const override;
    void evaluateEnrFuncDerivAt(FloatArray &oEnrFuncDeriv, const FloatArray &iPos, const double &iLevelSet, const FloatArray &iGradLevelSet) const override;
 
    void giveJump(std :: vector< double > &oJumps) const override {
        oJumps.clear();
        oJumps.push_back(2.0);
    }
 
    const char *giveClassName() const override { return "DiscontinuousFunction"; }
    const char *giveInputRecordName() const override { return _IFT_DiscontinuousFunction_Name; }
};

class OOFEM_EXPORT HeavisideFunction : public EnrichmentFunction
{
public:
    HeavisideFunction(int n, Domain *aDomain) : EnrichmentFunction(n, aDomain) {
        this->numberOfDofs = 1;
    }
 
    void evaluateEnrFuncAt(double &oEnrFunc, const FloatArray &iPos, const double &iLevelSet) const override;
    void evaluateEnrFuncDerivAt(FloatArray &oEnrFuncDeriv, const FloatArray &iPos, const double &iLevelSet, const FloatArray &iGradLevelSet) const override;
 
    void giveJump(std :: vector< double > &oJumps) const override {
        oJumps.clear();
        oJumps.push_back(1.0);
    }
 
    const char *giveClassName() const override { return "HeavisideFunction"; }
    const char *giveInputRecordName() const override { return _IFT_HeavisideFunction_Name; }
};

class OOFEM_EXPORT LinElBranchFunction
{
public:
    LinElBranchFunction() { }
 
    void evaluateEnrFuncAt(std :: vector< double > &oEnrFunc, const double &iR, const double &iTheta) const;
    void evaluateEnrFuncDerivAt(std :: vector< FloatArray > &oEnrFuncDeriv, const double &iR, const double &iTheta) const;
 
    void giveJump(std :: vector< double > &oJumps) const;
    void giveJump(std :: vector< double > &oJumps, const double &iRadius) const;
 
    std :: string errorInfo(const char *func) const { return std :: string( giveClassName() ) + func; }
    const char *giveClassName() const { return "LinElBranchFunction"; }
};

class OOFEM_EXPORT CohesiveBranchFunction
{
protected:
    double mExponent;
 
public:
    CohesiveBranchFunction() : mExponent(0.5) { }
 
    void evaluateEnrFuncAt(std :: vector< double > &oEnrFunc, const double &iR, const double &iTheta) const;
    void evaluateEnrFuncDerivAt(std :: vector< FloatArray > &oEnrFuncDeriv, const double &iR, const double &iTheta) const;
 
    void giveJump(std :: vector< double > &oJumps) const;
    void giveJump(std :: vector< double > &oJumps, const double &iRadius) const;
 
    std :: string errorInfo(const char *func) const { return std :: string( giveClassName() ) + func; }
    const char *giveClassName() const { return "CohesiveBranchFunction"; }
};

class OOFEM_EXPORT RampFunction : public EnrichmentFunction
{
public:
 
    RampFunction(int n, Domain *aDomain) : EnrichmentFunction(n, aDomain) {
        this->numberOfDofs = 1;
    }
 
    void evaluateEnrFuncAt(double &oEnrFunc, const FloatArray &iPos, const double &iLevelSet) const override;
    void evaluateEnrFuncDerivAt(FloatArray &oEnrFuncDeriv, const FloatArray &iPos, const double &iLevelSet, const FloatArray &iGradLevelSet) const override;
 
    void giveJump(std :: vector< double > &oJumps) const override {
        oJumps.clear();
        oJumps.push_back(0.0);
    }
 
    const char *giveClassName() const override { return "RampFunction"; }
    const char *giveInputRecordName() const override { return _IFT_RampFunction_Name; }
};
} // end namespace oofem
#endif  // enrichmentfunction_h