185 lines
6.1 KiB
C++
185 lines
6.1 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.1
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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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elasticOrthoGenDirULSolidFoam
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Description
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Transient/steady-state segregated finite-volume solver for large strain
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elastic orthotropic solid bodies allowing for general principal material
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directions.
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Displacement increment field DU is solved for using an updated Lagrangian
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approach,
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also generating the Almansi strain tensor field epsilon and Cauchy stress
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tensor field sigma.
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At the end of each time-step, the mesh is moved and sigma, epsilon and C
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are rotated to the new configuration.
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Please cite:
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Cardiff P, Karac A & Ivankovic A, A Large Strain Finite Volume Method for
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Orthotropic Bodies with General Material Orientations, Computer Methods
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in Applied Mechanics & Engineering, Sep 2013,
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http://dx.doi.org/10.1016/j.cma.2013.09.008
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Author
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Philip Cardiff UCD
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\*---------------------------------------------------------------------------*/
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#include "fvCFD.H"
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#include "constitutiveModel.H"
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#include "transformField.H"
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#include "transformGeometricField.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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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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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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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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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 = 1.0;
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lduMatrix::debug = 0;
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//- div(sigmaOld) should be zero but I will include
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//- it to make sure errors don't accumulate
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volVectorField* oldErrorPtr = nullptr;
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if (ensureTotalEquilibrium)
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{
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oldErrorPtr = new volVectorField
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(
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fvc::d2dt2(rho.oldTime(), U.oldTime())
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- fvc::div(sigma)
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);
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}
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do
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{
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DU.storePrevIter();
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//- Updated lagrangian momentum equation
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fvVectorMatrix DUEqn
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(
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fvm::d2dt2(rho, DU)
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+ fvc::d2dt2(rho, U)
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==
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fvm::laplacian(K, DU, "laplacian(K,DU)")
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+ fvc::div
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(
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DSigma
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- (K & gradDU)
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+ ( (sigma + DSigma) & gradDU ),
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"div(sigma)"
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)
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//- fvc::laplacian(K, DU)
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);
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if (ensureTotalEquilibrium)
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{
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//- to stop accumulation of errors
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DUEqn += *oldErrorPtr;
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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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DU.relax();
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gradDU = fvc::grad(DU);
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//- for 2-D plane stress simulations, the zz component of gradDU
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//- ensures sigma.zz() is zero
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//- it is assumed that z is the empty direction
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//# include "checkPlaneStress.H"
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//- sigma needs to be calculated inside the momentum loop as
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//- it is used in the momentum equation
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DEpsilon = symm(gradDU) + 0.5*symm(gradDU & gradDU.T());
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DSigma = C && DEpsilon;
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if (iCorr % infoFrequency == 0)
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{
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Info<< "\tTime " << runTime.value()
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<< ", Corr " << 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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<< ", inner 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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solverPerf.initialResidual() > convergenceTolerance
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&& ++iCorr < nCorr
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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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<< ", No outer iterations " << iCorr
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<< nl << "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
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<< " ClockTime = " << runTime.elapsedClockTime() << " s"
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<< endl;
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# include "moveMeshLeastSquares.H"
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# include "rotateFields.H"
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# include "writeFields.H"
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Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
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<< " ClockTime = " << runTime.elapsedClockTime() << " s\n\n"
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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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