foam-extend4.1-coherent-io/applications/solvers/solidMechanics/elasticOrthoNonLinULSolidFoam/elasticOrthoNonLinULSolidFoam.C

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2004-2007 Hrvoje Jasak
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 2 of the License, or (at your
    option) any later version.

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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

Application
    elasticOrthoGenDirULSolidFoam

Description
    Transient/steady-state segregated finite-volume solver for large strain
    elastic orthotropic solid bodies allowing for general principal material
    directions.

    Displacement increment field DU is solved for using an updated Lagrangian
    approach,
    also generating the Almansi strain tensor field epsilon and Cauchy stress
    tensor field sigma.

    At the end of each time-step, the mesh is moved and sigma, epsilon and C
    are rotated to the new configuration.

    Please cite:
    Cardiff P, Karac A & Ivankovic A, A Large Strain Finite Volume Method for
    Orthotropic Bodies with General Material Orientations, Computer Methods
    in Applied Mechanics & Engineering, Sep 2013,
    http://dx.doi.org/10.1016/j.cma.2013.09.008

Author
    Philip Cardiff UCD

\*---------------------------------------------------------------------------*/

#include "fvCFD.H"
#include "constitutiveModel.H"
#include "transformField.H"
#include "transformGeometricField.H"
#include "pointPatchInterpolation.H"
#include "primitivePatchInterpolation.H"
#include "pointFields.H"
#include "twoDPointCorrector.H"
#include "leastSquaresVolPointInterpolation.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
# include "setRootCase.H"
# include "createTime.H"
# include "createMesh.H"
# include "createFields.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

  Info<< "\nStarting time loop\n" << endl;

  for (runTime++; !runTime.end(); runTime++)
    {
      Info<< "Time: " << runTime.timeName() << nl << endl;

#     include "readSolidMechanicsControls.H"

      int iCorr = 0;
      lduMatrix::solverPerformance solverPerf;
      scalar initialResidual = 1.0;
      lduMatrix::debug = 0;

      //- div(sigmaOld) should be zero but I will include
      //- it to make sure errors don't accumulate
      volVectorField* oldErrorPtr = NULL;
      if (ensureTotalEquilibrium)
      {
          oldErrorPtr = new volVectorField
              (
                  fvc::d2dt2(rho.oldTime(), U.oldTime())
                  - fvc::div(sigma)
                  );
      }

      do
      {
          DU.storePrevIter();

          //- Updated lagrangian momentum equation
          fvVectorMatrix DUEqn
              (
                  fvm::d2dt2(rho, DU)
                  + fvc::d2dt2(rho, U)
                  ==
                  fvm::laplacian(K, DU, "laplacian(K,DU)")
                  + fvc::div(
                      DSigma
                      - (K & gradDU)
                      + ( (sigma + DSigma) & gradDU ),
                      "div(sigma)"
                      )
                  //- fvc::laplacian(K, DU)
                  );

          if (ensureTotalEquilibrium)
          {
              //- to stop accumulation of errors
              DUEqn += *oldErrorPtr;
          }

          solverPerf = DUEqn.solve();

          if (iCorr == 0)
          {
              initialResidual = solverPerf.initialResidual();
          }

          DU.relax();

          gradDU = fvc::grad(DU);

          //- for 2-D plane stress simulations, the zz component of gradDU
          //- ensures sigma.zz() is zero
          //- it is assumed that z is the empty direction
          //#         include "checkPlaneStress.H"

          //- sigma needs to be calculated inside the momentum loop as
          //- it is used in the momentum equation
          DEpsilon = symm(gradDU) + 0.5*symm(gradDU & gradDU.T());
          DSigma = C && DEpsilon;

          if (iCorr % infoFrequency == 0)
          {
              Info << "\tTime " << runTime.value()
                   << ", Corr " << iCorr
                   << ", Solving for " << DU.name()
                   << " using " << solverPerf.solverName()
                   << ", res = " << solverPerf.initialResidual()
                  //<< ", rel res = " << relativeResidual
                   << ", inner iters " << solverPerf.nIterations() << endl;
          }
      }
      while
          (
              solverPerf.initialResidual() > convergenceTolerance
              &&
              ++iCorr < nCorr
              );

      Info << nl << "Time " << runTime.value() << ", Solving for " << DU.name()
           << ", Initial residual = " << initialResidual
           << ", Final residual = " << solverPerf.initialResidual()
           << ", No outer iterations " << iCorr
           << nl << "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
           << "  ClockTime = " << runTime.elapsedClockTime() << " s"
           << endl;

#     include "moveMeshLeastSquares.H"
#     include "rotateFields.H"
#     include "writeFields.H"

      Info<< "ExecutionTime = "
          << runTime.elapsedCpuTime()
          << " s\n\n" << endl;
    }

  Info<< "End\n" << endl;

  return(0);
}


// ************************************************************************* //