void
RCM2Material :: giveRealStressVector(FloatArray &answer, MatResponseForm form, GaussPoint *gp,
const FloatArray &totalStrain,
TimeStep *atTime)
//
// returns real stress vector in 3d stress space of receiver according to
// previous level of stress and current
// strain increment, the only way, how to correctly update gp records
//
{
FloatArray princStress, reducedStressVector, crackStrain, reducedAnswer;
FloatArray reducedTotalStrainVector, principalStrain, strainVector;
FloatMatrix tempCrackDirs;
RCM2MaterialStatus *status = ( RCM2MaterialStatus * ) this->giveStatus(gp);
StructuralCrossSection *crossSection = ( StructuralCrossSection * ) gp->giveElement()->giveCrossSection();
this->initTempStatus(gp);
this->initGpForNewStep(gp);
// subtract stress independent part
// note: eigenStrains (temperature) is not contained in mechanical strain stored in gp
// therefore it is necessary to subtract always the total eigen strain value
this->giveStressDependentPartOfStrainVector(reducedTotalStrainVector, gp, totalStrain, atTime, VM_Total);
//
crossSection->giveFullCharacteristicVector(strainVector, gp, reducedTotalStrainVector);
status->giveTempCrackDirs(tempCrackDirs);
this->computePrincipalValDir(principalStrain, tempCrackDirs,
strainVector,
principal_strain);
this->giveRealPrincipalStressVector3d(princStress, gp, principalStrain, tempCrackDirs, atTime);
princStress.resize(6);
status->giveTempCrackDirs(tempCrackDirs);
this->transformStressVectorTo(answer, tempCrackDirs, princStress, 1);
status->letTempStrainVectorBe(totalStrain);
crossSection->giveReducedCharacteristicVector(reducedStressVector, gp, answer);
status->letTempStressVectorBe(reducedStressVector);
status->giveCrackStrainVector(crackStrain);
this->updateCrackStatus(gp, crackStrain);
if ( form == FullForm ) {
return;
}
crossSection->giveReducedCharacteristicVector(reducedAnswer, gp, answer);
answer = reducedAnswer;
}
void
J2plasticMaterial :: computeTrialStressIncrement(FloatArray &answer, GaussPoint *gp,
const FloatArray &strainIncrement,
TimeStep *atTime)
{ /* Computes the full trial elastic stress vector */
FloatArray reducedAnswer;
FloatMatrix reducedModuli;
StructuralCrossSection *crossSection = ( StructuralCrossSection * )
( gp->giveElement()->giveCrossSection() );
this->giveLinearElasticMaterial()->giveCharacteristicMatrix(reducedModuli, ReducedForm, ElasticStiffness,
gp, atTime);
reducedAnswer.beProductOf(reducedModuli, strainIncrement);
crossSection->giveFullCharacteristicVector(answer, gp, reducedAnswer);
}