trabbonenl.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 "trabbonenl.h"
#include "gausspoint.h"
#include "floatarray.h"
#include "mathfem.h"
#include "nonlocalmaterialext.h"
#include "classfactory.h"
#include "dynamicinputrecord.h"
 
#ifdef __OOFEG
 #include "oofeggraphiccontext.h"
#endif
 
namespace oofem {
 
REGISTER_Material(TrabBoneNL);

// BEGIN: CONSTRUCTOR
//
 
TrabBoneNL :: TrabBoneNL(int n, Domain *d) : TrabBoneMaterial(n, d), StructuralNonlocalMaterialExtensionInterface(d)
{
}
 
//
// END: CONSTRUCTOR
 

// BEGIN: SUBROUTINE FOR UPDATE BEFORE NON LOCAL AVERAGE
// update local values of accumulated pastic strain
 
void
TrabBoneNL :: updateBeforeNonlocAverage(const FloatArray &strainVector, GaussPoint *gp, TimeStep *tStep) const
{
    auto nlstatus = static_cast< TrabBoneNLStatus * >( this->giveStatus(gp) );
 
    FloatArray SDstrainVector;
 
    this->initTempStatus(gp);
    this->giveStressDependentPartOfStrainVector(SDstrainVector, gp, strainVector, tStep, VM_Total);
 
    nlstatus->letTempStrainVectorBe(strainVector);
 
    this->performPlasticityReturn(gp, strainVector);
    double cumPlastStrain = this->computeLocalCumPlastStrain(strainVector, gp, tStep);
    nlstatus->setLocalCumPlastStrainForAverage(cumPlastStrain);
}
 
//
// END: SUBROUTINE FOR UPDATE BEFORE NON LOCAL AVERAGE
 

// BEGIN: SUBROUTINE FOR EVALUATION OF TOTAL STRESS
//
 
FloatArrayF<1>
TrabBoneNL :: giveRealStressVector_1d(const FloatArrayF<1> &strainVector,
                                      GaussPoint *gp, TimeStep *tStep) const
{
    auto nlStatus = static_cast< TrabBoneNLStatus * >( this->giveStatus(gp) );
 
    double tempDamage = computeDamage(gp, tStep);
    double plasStrain = nlStatus->giveTempPlasStrainVector().at(1);
    double elasStrain = strainVector.at(1) - plasStrain;
    double effStress = E0 * elasStrain;
    double sigc = nlStatus->giveSigC();
 
    FloatArrayF<1> stress = {( 1. - tempDamage ) * effStress + sigc};
 
    nlStatus->setTempDam(tempDamage);
    nlStatus->letTempStrainVectorBe(strainVector);
    nlStatus->letTempStressVectorBe(stress);
    return stress;
}
 
//
// END: SUBROUTINE FOR EVALUATION OF TOTAL STRESS
 

// BEGIN: SUBROUTINE OF NONLOCAL ALPHA EVALUATION
//
 
double
TrabBoneNL :: computeCumPlastStrain(GaussPoint *gp, TimeStep *tStep) const
{
    auto status = static_cast< TrabBoneNLStatus * >( this->giveStatus(gp) );
 
    this->buildNonlocalPointTable(gp);
    this->updateDomainBeforeNonlocAverage(tStep);
 
    auto list = status->giveIntegrationDomainList();
 
    double nonlocalCumPlastStrain = 0.0;
    for ( auto &lir: *list ) {
        auto nonlocStatus = static_cast< TrabBoneNLStatus * >( this->giveStatus(lir.nearGp) );
        double nonlocalContribution = nonlocStatus->giveLocalCumPlastStrainForAverage();
        nonlocalContribution *= lir.weight;
        nonlocalCumPlastStrain += nonlocalContribution;
    }
 
    nonlocalCumPlastStrain *= 1. / status->giveIntegrationScale();
 
    double localCumPlastStrain = status->giveLocalCumPlastStrainForAverage();
    return mParam * nonlocalCumPlastStrain + ( 1 - mParam ) * localCumPlastStrain;
}
 
//
// END: SUBROUTINE OF NONLOCAL ALPHA EVALUATION
 

// BEGIN: INTERFACE ????
//
 
Interface *
TrabBoneNL :: giveInterface(InterfaceType type)
{
    if ( type == NonlocalMaterialExtensionInterfaceType ) {
        return static_cast< StructuralNonlocalMaterialExtensionInterface * >(this);
    } else {
        return NULL;
    }
}
 
//
// END: INTERFACE ????
 

// BEGIN: PARAMETERS OF INPUT FILE
//
 
void
TrabBoneNL :: initializeFrom(InputRecord &ir)
{
    TrabBoneMaterial :: initializeFrom(ir);
    StructuralNonlocalMaterialExtensionInterface :: initializeFrom(ir);
 
    IR_GIVE_FIELD(ir, R, _IFT_TrabBoneNL_r);
    if ( R < 0.0 ) {
        R = 0.0;
    }
 
    mParam = 1.;
    IR_GIVE_OPTIONAL_FIELD(ir, mParam, _IFT_TrabBoneNL_m);
}
 
//
// END: PARAMETERS OF INPUT FILE
 

// BEGIN: ??????????????
//
 
void
TrabBoneNL :: giveInputRecord(DynamicInputRecord &input)
{
    TrabBoneMaterial :: giveInputRecord(input);
    input.setField(this->R, _IFT_TrabBoneNL_r);
    input.setField(this->mParam, _IFT_TrabBoneNL_m);
}
 
 
//
// END: ????????????????
 

// BEGIN: WEIGHT FUNCTION FOR NONLOCAL CONTRIBUTION
//
 
double
TrabBoneNL :: computeWeightFunction(const double R, const FloatArray &src, const FloatArray &coord) const
{
    double dist = distance(src, coord);
 
    if ( ( dist >= 0. ) && ( dist <= this->R ) ) {
        double help = ( 1. - dist * dist / ( R * R ) );
        return help * help;
    }
 
    return 0.0;
}
 
//
// END: WEIGHT FUNCTION FOR NONLOCAL CONTRIBUTION
 

 
 
TrabBoneNLStatus :: TrabBoneNLStatus(GaussPoint *g) :
    TrabBoneMaterialStatus(g), StructuralNonlocalMaterialStatusExtensionInterface()
{
}
 
 
void
TrabBoneNLStatus :: printOutputAt(FILE *file, TimeStep *tStep) const
{
    StructuralMaterialStatus :: printOutputAt(file, tStep);
    fprintf(file, "status {");
    fprintf(file, " plastrains ");
    for ( auto &val : epsp) {
        fprintf( file, " %.4e", val );
    }
 
    fprintf(file, ",");
    fprintf(file, " alpha %.4e,", alpha);
    fprintf(file, " dam  %.4e", dam);
    fprintf(file, "}\n");
}

// BEGIN: INITIALIZE TEMP VARIABLE (UPDATED DURING ITERATIONS)
// initialize temporary state variables according to equilibriated state vars
 
void
TrabBoneNLStatus :: initTempStatus()
{
    TrabBoneMaterialStatus :: initTempStatus();
}
 
//
// END: INITIALIZE TEMP VARIABLE (UPDATED DURING ITERATIONS)
 

// BEGIN: SETS VARIABLE EQUAL TO TEMP VARIABLE AT THE END OF THE STEP
// Called when equlibrium reached, set equilibriated vars according to temporary (working) ones.
 
void
TrabBoneNLStatus :: updateYourself(TimeStep *tStep)
{
    TrabBoneMaterialStatus :: updateYourself(tStep);
}
 
//
// END: SETS VARIABLE EQUAL TO TEMP VARIABLE AT THE END OF THE STE
 

// BEGIN: INTERFACE ???????????
//
 
Interface *
TrabBoneNLStatus :: giveInterface(InterfaceType type)
{
    if ( type == NonlocalMaterialStatusExtensionInterfaceType ) {
        return this;
    } else {
        return nullptr;
    }
}
 
//
// END: INTERFACE ???????????????
} // end namespace oofem