209 lines
6.7 KiB
C++
209 lines
6.7 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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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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Application
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elasticPlasticNonLinULSolidFoam
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Description
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Finite volume structural solver employing a incremental strain updated
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Lagrangian approach.
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Valid for small strains, finite displacements and finite rotations.
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Note: the reason the solver is not strictly valid for large strains is
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because the constitutive stiffness tensor is not rotated.
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For an updated Lagrangian solver which does rotate the stiffness tensor, and
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hence is strictly Valid for large strains, use
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elasticOrthoNonLinULSolidFoam.
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Author
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Philip Cardiff UCD
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Aitken relaxation by T. Tang DTU
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "constitutiveModel.H"
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#include "volPointInterpolation.H"
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#include "pointPatchInterpolation.H"
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#include "primitivePatchInterpolation.H"
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#include "pointFields.H"
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#include "twoDPointCorrector.H"
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#include "leastSquaresVolPointInterpolation.H"
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#include "transformGeometricField.H"
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#include "solidContactFvPatchVectorField.H"
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#include "pointMesh.H"
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#include "symmetryPolyPatch.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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# include "setRootCase.H"
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# include "createTime.H"
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# include "createMesh.H"
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# include "createFields.H"
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# include "createHistory.H"
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# include "readDivDSigmaExpMethod.H"
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# include "readDivDSigmaNonLinExpMethod.H"
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# include "readMoveMeshMethod.H"
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# include "findGlobalFaceZones.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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Info<< "\nStarting time loop\n" << endl;
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while(runTime.loop())
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{
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Info<< "Time = " << runTime.timeName() << nl << endl;
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# include "readSolidMechanicsControls.H"
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int iCorr = 0;
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lduSolverPerformance solverPerf;
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scalar initialResidual = 0;
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scalar relativeResidual = 1.0;
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lduMatrix::debug = 0;
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do
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{
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DU.storePrevIter();
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# include "calculateDivDSigmaExp.H"
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# include "calculateDivDSigmaNonLinExp.H"
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// Updated lagrangian large strain momentum equation
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fvVectorMatrix DUEqn
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(
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fvm::d2dt2(rho,DU)
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==
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fvm::laplacian(2*muf + lambdaf, DU, "laplacian(DDU,DU)")
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+ divDSigmaExp
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+ divDSigmaNonLinExp
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//- fvc::div(2*mu*DEpsilonP, "div(sigma)")
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- fvc::div(2*muf*( mesh.Sf() & fvc::interpolate(DEpsilonP)) )
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);
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if(nonLinearSemiImplicit)
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{
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// experimental
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// we can treat the nonlinear term (gradDU & gradDU.T()) in a
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// semi-implicit over-relaxed manner
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// this should improve convergence when gradDU is large
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// but maybe not execution time
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DUEqn -=
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fvm::laplacian
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(
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(2*mu + lambda)*gradDU, DU, "laplacian(DDU,DU)"
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)
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- fvc::div( (2*mu + lambda)*(gradDU&gradDU), "div(sigma)");
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}
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solverPerf = DUEqn.solve();
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if(iCorr == 0)
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{
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initialResidual = solverPerf.initialResidual();
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}
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if(aitkenRelax)
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{
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# include "aitkenRelaxation.H"
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}
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else
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{
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DU.relax();
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}
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gradDU = fvc::grad(DU);
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// correct plasticty term
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rheology.correct();
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// correct elastic properties
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// for nonlinear elastic materials
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//mu = rheology.newMu();
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//lambda = rheology.newLambda();
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//muf = fvc::interpolate(mu);
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//lambdaf = fvc::interpolate(lambda);
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# include "calculateDEpsilonDSigma.H"
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# include "calculateRelativeResidual.H"
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if(iCorr % infoFrequency == 0)
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{
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Info<< "\tTime " << runTime.value()
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<< ", Corrector " << iCorr
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<< ", Solving for " << DU.name()
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<< " using " << solverPerf.solverName()
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<< ", res = " << solverPerf.initialResidual()
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<< ", rel res = " << relativeResidual;
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if(aitkenRelax)
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{
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Info<< ", aitken = " << aitkenTheta;
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}
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Info<< ", iters = " << solverPerf.nIterations() << endl;
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}
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}
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while
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(
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iCorr++ < 2
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(
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//solverPerf.initialResidual() > convergenceTolerance
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relativeResidual > convergenceTolerance
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&& iCorr < nCorr
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)
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);
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Info<< nl << "Time " << runTime.value() << ", Solving for " << DU.name()
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<< ", Initial residual = " << initialResidual
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<< ", Final residual = " << solverPerf.initialResidual()
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<< ", Final rel residual = " << relativeResidual
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<< ", No outer iterations " << iCorr << endl;
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rheology.updateYieldStress();
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U += DU;
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epsilon += DEpsilon;
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epsilonP += DEpsilonP;
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sigma += DSigma;
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# include "moveMesh.H"
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# include "rotateFields.H"
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# include "writeFields.H"
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# include "writeHistory.H"
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Info<< nl << "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
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<< " ClockTime = " << runTime.elapsedClockTime() << " s"
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<< endl;
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}
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Info<< "End\n" << endl;
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return(0);
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}
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// ************************************************************************* //
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