/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2005 OpenCFD Ltd.
     \\/     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.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Application
    stressFemFoam

Description
    Steady-state segregated finite-element solver of linear-elastic,
    small-strain deformation of a solid body.

    Simple linear elasticity structural analysis code.
    Solves for the displacement vector field U, also generating the
    stress tensor field sigma.

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

#include "fvCFD.H"

#include "tetPolyMesh.H"
#include "tetPointFields.H"

#include "tetFem.H"
#include "tetFec.H"

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

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

#   include "createFemMesh.H"
#   include "createFemFields.H"

#   include "readMechanicalProperties.H"

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

    Info << "\nCalculating displacement field\n" << endl;
 
    for (runTime++; !runTime.end(); runTime++)
    {
        Info<< "Iteration: " << runTime.timeName() << nl << endl;

        tetFemMatrix<vector> UEqn
        (
            tetFem::laplacian(mu, U)
          + tetFem::laplacianTranspose(mu, U)
          + tetFem::laplacianTrace(lambda, U)
        );

        solve(UEqn);

#       include "calculateStress.H"

        Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
            << "  ClockTime = " << runTime.elapsedClockTime() << " s"
            << nl << endl;
    }

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

    return(0);
}

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