324 lines
8.8 KiB
C
324 lines
8.8 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration |
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\\ / A nd | For copyright notice see file Copyright
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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Class
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cohesiveZoneFvPatchVectorField
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Description
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\*---------------------------------------------------------------------------*/
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#include "cohesiveZoneFvPatchVectorField.H"
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#include "addToRunTimeSelectionTable.H"
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#include "transformField.H"
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#include "volFields.H"
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#include "rheologyModel.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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cohesiveZoneFvPatchVectorField::cohesiveZoneFvPatchVectorField
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(
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF
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)
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:
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directionMixedFvPatchVectorField(p, iF),
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UName_("undefined"),
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rheologyName_("undefined"),
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cohesiveLawPtr_(NULL),
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relaxationFactor_(1.0)
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{}
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cohesiveZoneFvPatchVectorField::cohesiveZoneFvPatchVectorField
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(
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const cohesiveZoneFvPatchVectorField& ptf,
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF,
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const fvPatchFieldMapper& mapper
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)
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:
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directionMixedFvPatchVectorField(ptf, p, iF, mapper),
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UName_(ptf.UName_),
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rheologyName_(ptf.rheologyName_),
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cohesiveLawPtr_(ptf.cohesiveLawPtr_),
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relaxationFactor_(ptf.relaxationFactor_)
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{}
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cohesiveZoneFvPatchVectorField::cohesiveZoneFvPatchVectorField
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(
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const fvPatch& p,
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const DimensionedField<vector, volMesh>& iF,
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const dictionary& dict
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)
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:
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directionMixedFvPatchVectorField(p, iF),
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UName_(dict.lookup("U")),
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rheologyName_(dict.lookup("rheology")),
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cohesiveLawPtr_
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(
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cohesiveLaw::New(dict.lookup("cohesiveLaw"), dict).ptr()
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),
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relaxationFactor_(readScalar(dict.lookup("relaxationFactor")))
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{
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if (dict.found("refValue"))
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{
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this->refValue() = vectorField("refValue", dict, p.size());
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}
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else
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{
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this->refValue() = vector::zero;
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}
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if (dict.found("refGradient"))
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{
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this->refGrad() = vectorField("refGradient", dict, p.size());
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}
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else
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{
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this->refGrad() = vector::zero;
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}
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if (dict.found("valueFraction"))
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{
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this->valueFraction() =
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symmTensorField("valueFraction", dict, p.size());
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}
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else
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{
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vectorField n = patch().nf();
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this->valueFraction() = sqr(n);
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}
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if (dict.found("value"))
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{
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Field<vector>::operator=(vectorField("value", dict, p.size()));
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}
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else
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{
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Field<vector> normalValue = transform(valueFraction(), refValue());
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Field<vector> gradValue =
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this->patchInternalField() + refGrad()/this->patch().deltaCoeffs();
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Field<vector> transformGradValue =
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transform(I - valueFraction(), gradValue);
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Field<vector>::operator=(normalValue + transformGradValue);
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}
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}
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cohesiveZoneFvPatchVectorField::cohesiveZoneFvPatchVectorField
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(
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const cohesiveZoneFvPatchVectorField& ptf,
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const DimensionedField<vector, volMesh>& iF
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)
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:
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directionMixedFvPatchVectorField(ptf, iF),
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UName_(ptf.UName_),
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rheologyName_(ptf.rheologyName_),
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cohesiveLawPtr_(ptf.cohesiveLawPtr_),
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relaxationFactor_(ptf.relaxationFactor_)
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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// Map from self
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void cohesiveZoneFvPatchVectorField::autoMap
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(
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const fvPatchFieldMapper& m
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)
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{
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if (cohesiveLawPtr_ == NULL)
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{
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FatalErrorIn("cohesiveZoneFvPatchVectorField::autoMap")
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<< "NULL cohesive law"
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<< abort(FatalError);
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}
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directionMixedFvPatchVectorField::autoMap(m);
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}
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// Reverse-map the given fvPatchField onto this fvPatchField
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void cohesiveZoneFvPatchVectorField::rmap
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(
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const fvPatchField<vector>& ptf,
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const labelList& addr
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)
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{
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directionMixedFvPatchVectorField::rmap(ptf, addr);
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const cohesiveZoneFvPatchVectorField& dmptf =
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refCast<const cohesiveZoneFvPatchVectorField>(ptf);
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// No need to grab the cohesive zone pointer more than once
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if (!cohesiveLawPtr_)
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{
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cohesiveLawPtr_ = dmptf.cohesiveLawPtr_->clone().ptr();
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relaxationFactor_ = dmptf.relaxationFactor_;
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}
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}
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void cohesiveZoneFvPatchVectorField::updateCoeffs()
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{
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if (this->updated())
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{
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return;
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}
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// Looking up rheology
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const rheologyModel& rheology =
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this->db().objectRegistry::lookupObject<rheologyModel>(rheologyName_);
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const scalarField mu =
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rheology.mu()().boundaryField()[patch().index()];
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const scalarField lambda =
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rheology.lambda()().boundaryField()[patch().index()];
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const fvPatchField<tensor>& gradU =
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patch().lookupPatchField<volTensorField, tensor>
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(
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"grad(" +UName_ + ")"
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);
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// Patch displacement
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const vectorField& U = *this;
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// Patch stress
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tensorField sigma = mu*(gradU + gradU.T()) + I*(lambda*tr(gradU));
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// Patch normal
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vectorField n = patch().nf();
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// Normal stress component
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scalarField sigmaN = (n&(n&sigma));
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// Chech crack propagation
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forAll(sigmaN, faceI)
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{
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vector cohesiveTraction = vector::zero;
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if
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(
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(magSqr(valueFraction()[faceI]) > 1-SMALL)
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&& (sigmaN[faceI] >= law().sigmaMax().value())
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)
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{
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// Switch to full traction boundary condition
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valueFraction()[faceI] = symmTensor::zero;
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Info << "Crack started at face: " << faceI << endl;
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// Cohesive traction
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cohesiveTraction = n[faceI]*law().sigmaMax().value();
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}
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else if(magSqr(valueFraction()[faceI]) < SMALL)
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{
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// Normal displacement
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scalar Un = -(n[faceI]&U[faceI]);
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if(Un < 0)
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{
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// Return from traction to symmetryPlane
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refValue()[faceI] = vector::zero;
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refGrad() = vector::zero;
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valueFraction()[faceI] = sqr(n[faceI]);
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Info << "Face removed from crack: " << faceI << endl;
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}
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else if(Un > law().deltaC().value()/2)
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{
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// Traction free
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cohesiveTraction = vector::zero;
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}
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else
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{
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// Calculate cohesive traction from cohesive zone model
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cohesiveTraction = law().traction(2*Un)*n[faceI];
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}
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}
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if(magSqr(valueFraction()[faceI]) < SMALL)
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{
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cohesiveTraction =
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relaxationFactor_*cohesiveTraction
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+ (1.0 - relaxationFactor_)*sigmaN[faceI]*n[faceI];
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refGrad()[faceI] =
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(
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cohesiveTraction
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- (
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n[faceI]
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& (
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mu[faceI]*gradU[faceI].T()
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- (mu[faceI] + lambda[faceI])*gradU[faceI]
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)
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)
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- n[faceI]*lambda[faceI]*tr(gradU[faceI])
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)
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/(2.0*mu[faceI] + lambda[faceI]);
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}
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}
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directionMixedFvPatchVectorField::updateCoeffs();
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}
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// Write
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void cohesiveZoneFvPatchVectorField::write(Ostream& os) const
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{
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directionMixedFvPatchVectorField::write(os);
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os.writeKeyword("U") << UName_ << token::END_STATEMENT << nl;
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os.writeKeyword("rheology") << rheologyName_ << token::END_STATEMENT << nl;
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os.writeKeyword("cohesiveLaw") << law().type()
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<< token::END_STATEMENT << nl;
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os.writeKeyword("relaxationFactor") << relaxationFactor_
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<< token::END_STATEMENT << nl;
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law().writeDict(os);
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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makePatchTypeField(fvPatchVectorField, cohesiveZoneFvPatchVectorField);
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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