tdclw.cc

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/struct/tdclw.cc,v 1.24 2017/01/12 14:46:44 masarati Exp $ */
/*
 * MBDyn (C) is a multibody analysis code.
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation (version 2 of the License).
 *
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/* Cerniera deformabile */

#include "mbconfig.h"           /* This goes first in every *.c,*.cc file */

#include <typeinfo>
#include "dataman.h"
#include "tdclw.h"

/* TDConstitutiveLawWrapper - begin */

template <class T, class Tder>
class TDConstitutiveLawWrapper
: public ConstitutiveLaw<T, Tder> {
private:
        doublereal dF, dW, dScaleEpsilon, dScaleForce, dWCurr;
        T EpsPrev, FPrev;
        ConstitutiveLaw<T, Tder> *pCL;

public:
        TDConstitutiveLawWrapper(const doublereal& df,
                const doublereal& dl,
                const doublereal& dsd,
                const doublereal& dsf,
                const doublereal& dInitialWork,
                ConstitutiveLaw<T, Tder> *pcl);
        virtual ~TDConstitutiveLawWrapper(void);

        ConstLawType::Type GetConstLawType(void) const;

        virtual ConstitutiveLaw<T, Tder>* pCopy(void) const;
        virtual std::ostream& Restart(std::ostream& out) const;

        virtual void Update(const T& Eps, const T& EpsPrime = mb_zero<T>());

        virtual void AfterConvergence(const T& Eps, const T& EpsPrime = mb_zero<T>());
        virtual std::ostream& OutputAppend(std::ostream& out) const;
};

template <class T, class Tder>
TDConstitutiveLawWrapper<T, Tder>::TDConstitutiveLawWrapper(
        const doublereal& df,
        const doublereal& dl,
        const doublereal& dsd,
        const doublereal& dsf,
        const doublereal& dInitialWork,
        ConstitutiveLaw<T, Tder> *pcl)
: dF(df), dW(dl), dScaleEpsilon(dsd), dScaleForce(dsf),
dWCurr(dInitialWork), EpsPrev(mb_zero<T>()), FPrev(mb_zero<T>()), pCL(pcl)
{
        NO_OP;
}

template <class T, class Tder>
TDConstitutiveLawWrapper<T, Tder>::~TDConstitutiveLawWrapper(void)
{
        if (pCL) {
                delete pCL;
        }
}

template <class T, class Tder>
ConstLawType::Type
TDConstitutiveLawWrapper<T, Tder>::GetConstLawType(void) const
{
        return pCL->GetConstLawType();
}

template <class T, class Tder>
ConstitutiveLaw<T, Tder>*
TDConstitutiveLawWrapper<T, Tder>::pCopy(void) const
{
        ConstitutiveLaw<T, Tder>* pcl = NULL;

        typedef TDConstitutiveLawWrapper cl;
        SAFENEWWITHCONSTRUCTOR(pcl, cl,
                cl(dF, dW, dScaleEpsilon, dScaleForce, dWCurr, pCL->pCopy()));
        return pcl;
}

template <class T, class Tder>
std::ostream&
TDConstitutiveLawWrapper<T, Tder>::Restart(std::ostream& out) const
{
        out
                << "tdclw, " << dF
                << ", " << dW
                << ", scale deformation, " << dScaleEpsilon
                << ", scale force, " << dScaleForce
                << ", ";
        return pCL->Restart(out);
}

template <class T, class Tder>
void
TDConstitutiveLawWrapper<T, Tder>::Update(const T& Eps, const T& EpsPrime)
{
#if 0
        // not needed
        ConstitutiveLaw<T, Tder>::Epsilon = Eps;
#endif

        pCL->Update(Eps*dScaleEpsilon, EpsPrime*dScaleEpsilon);

        // don't use dWCurr if > 0.
        doublereal d = dScaleForce*(1. + dF*exp(-std::min(0., dWCurr)/dW));

        ConstitutiveLaw<T, Tder>::F = pCL->GetF()*d;
        if (GetConstLawType() & ConstLawType::ELASTIC) {
                ConstitutiveLaw<T, Tder>::FDE = pCL->GetFDE()*d;
        }
        if (GetConstLawType() & ConstLawType::VISCOUS) {
                ConstitutiveLaw<T, Tder>::FDEPrime = pCL->GetFDEPrime()*d;
        }
}

template <class T, class Tder>
void
TDConstitutiveLawWrapper<T, Tder>::AfterConvergence(const T& Eps, const T& EpsPrime)
{
        T EpsCurr = Eps*dScaleEpsilon;
        pCL->AfterConvergence(EpsCurr, EpsPrime*dScaleEpsilon);

        // average force * (old - new epsilon), to avoid unary - operator
        const T& FCurr = ConstitutiveLaw<T, Tder>::GetF();
        dWCurr += ((FCurr + FPrev)*(EpsPrev - EpsCurr))/2.;

        FPrev = FCurr;
        EpsPrev = EpsCurr;
}

template <class T, class Tder>
std::ostream&
TDConstitutiveLawWrapper<T, Tder>::OutputAppend(std::ostream& out) const
{
        return pCL->OutputAppend(out) << " " << dWCurr;
}

/* TDConstitutiveLawWrapper - end */


/* TDCLWR - begin */

template <class T, class Tder>
struct TDCLWR : public ConstitutiveLawRead<T, Tder> {
        virtual ConstitutiveLaw<T, Tder> *
        Read(const DataManager* pDM, MBDynParser& HP, ConstLawType::Type& CLType);
};

template <class T, class Tder>
ConstitutiveLaw<T, Tder> *
TDCLWR<T, Tder>::Read(const DataManager* pDM, MBDynParser& HP, ConstLawType::Type& CLType)
{
        ConstitutiveLaw<T, Tder>* pCL = 0;

        doublereal dF = HP.GetReal();

        doublereal dScaleEpsilon = 1.;
        if (HP.IsKeyWord("scale" "deformation")) {
                dScaleEpsilon = HP.GetReal();
        }

        doublereal dScaleForce = 1.;
        if (HP.IsKeyWord("scale" "force")) {
                dScaleForce = HP.GetReal();
        }

        doublereal dW = HP.GetReal();
        if (dW >= 0.) {
                silent_cerr("Invalid positive or null reference work in TDCLW "
                        "at line " << HP.GetLineData() << std::endl);
                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
        }

        doublereal dInitialWork = 0.;
        if (HP.IsKeyWord("initial" "work")) {
                dInitialWork = HP.GetReal();
                if (dInitialWork > 0.) {
                        silent_cerr("Invalid positive initial work in TDCLW "
                                "at line " << HP.GetLineData() << std::endl);
                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                }
        }
        
        ConstitutiveLaw<T, Tder>* pCL2;
        if (typeid(T) == typeid(doublereal)) {
                pCL2 = dynamic_cast<ConstitutiveLaw<T, Tder> *>(HP.GetConstLaw1D(CLType));
        } else if (typeid(T) == typeid(Vec3)) {
                pCL2 = dynamic_cast<ConstitutiveLaw<T, Tder> *>(HP.GetConstLaw3D(CLType));
        } else if (typeid(T) == typeid(Vec6)) {
                pCL2 = dynamic_cast<ConstitutiveLaw<T, Tder> *>(HP.GetConstLaw6D(CLType));
        } else {
                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
        }

        typedef TDConstitutiveLawWrapper<T, Tder> L;
        SAFENEWWITHCONSTRUCTOR(pCL, L,
                L(dF, dW, dScaleEpsilon, dScaleForce, dInitialWork, pCL2));

        return pCL;
}

/* TDCLWR - end */

void
TDCLW_init(void)
{
        SetCL1D("tdclw", new TDCLWR<doublereal, doublereal>);
        SetCL3D("tdclw", new TDCLWR<Vec3, Mat3x3>);
        SetCL6D("tdclw", new TDCLWR<Vec6, Mat6x6>);
}