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test_local_material.cc
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test_local_material.cc
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/**
* @file test_solid_mechanics_model.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Tue Jul 27 14:34:13 2010
*
* @brief test of the class SolidMechanicsModel
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
#include "fem.hh"
#include "material_damage.hh"
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.h"
#endif //AKANTU_USE_IOHELPER
using namespace akantu;
akantu::Real eps = 1e-10;
static void trac(__attribute__ ((unused)) double * position,double * stress){
memset(stress, 0, sizeof(Real)*4);
if (fabs(position[0] - 10) < eps){
stress[0] = 3e6;
stress[3] = 3e6;
}
}
int main(int argc, char *argv[])
{
UInt max_steps = 20000;
Real epot, ekin;
Real bar_height = 4.;
const UInt spatial_dimension = 2;
Mesh mesh(spatial_dimension);
MeshIOMSH mesh_io;
// mesh_io.read("bar.msh", mesh);
mesh_io.read("barre_trou.msh", mesh);
SolidMechanicsModel * model = new SolidMechanicsModel(mesh);
/// model initialization
model->initVectors();
UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
memset(model->getForce().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getVelocity().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getAcceleration().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getDisplacement().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getResidual().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getMass().values, 1, nb_nodes*sizeof(Real));
model->readCustomMaterial<MaterialDamage>("material.dat","DAMAGE");
model->initMaterials();
model->initModel();
Real time_step = model->getStableTimeStep();
model->setTimeStep(time_step/10.);
model->assembleMassLumped();
std::cout << *model << std::endl;
/// Dirichlet boundary conditions
for (akantu::UInt i = 0; i < nb_nodes; ++i) {
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i] <= eps)
model->getBoundary().values[spatial_dimension*i] = true;
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 1] <= eps ||
model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 1] >= bar_height - eps ) {
model->getBoundary().values[spatial_dimension*i + 1] = true;
}
}
FEM & fem_boundary = model->getFEMBoundary();
fem_boundary.initShapeFunctions();
fem_boundary.computeNormalsOnQuadPoints();
model->computeForcesFromFunction(trac, akantu::_bft_stress);
#ifdef AKANTU_USE_IOHELPER
model->updateResidual();
DumperParaview dumper;
dumper.SetMode(BASE64);
dumper.SetPoints(model->getFEM().getMesh().getNodes().values, 2, nb_nodes, "coordinates");
dumper.SetConnectivity((int *)model->getFEM().getMesh().getConnectivity(_triangle_6).values,
TRIANGLE2, model->getFEM().getMesh().getNbElement(_triangle_6), C_MODE);
dumper.AddNodeDataField(model->getDisplacement().values, 2, "displacements");
dumper.AddNodeDataField(model->getVelocity().values, 2, "velocity");
dumper.AddNodeDataField(model->getForce().values, 2, "force");
dumper.AddNodeDataField(model->getMass().values, 1, "Mass");
dumper.AddNodeDataField(model->getResidual().values, 2, "residual");
dumper.AddElemDataField(model->getMaterial(0).getStrain(_triangle_6).values, 4, "strain");
dumper.AddElemDataField(model->getMaterial(0).getStress(_triangle_6).values, 4, "stress");
MaterialDamage & mat = dynamic_cast<MaterialDamage&>(model->getMaterial(0));
Real * dam = mat.getDamage(_triangle_6).values;
dumper.AddElemDataField(dam, 1, "damage");
dumper.SetEmbeddedValue("displacements", 1);
dumper.SetEmbeddedValue("force", 1);
dumper.SetEmbeddedValue("residual", 1);
dumper.SetEmbeddedValue("velocity", 1);
dumper.SetPrefix("paraview/");
dumper.Init();
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
for(UInt s = 0; s < max_steps; ++s) {
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
epot = model->getPotentialEnergy();
ekin = model->getKineticEnergy();
std::cout << s << " " << epot << " " << ekin << " " << epot + ekin
<< std::endl;
#ifdef AKANTU_USE_IOHELPER
if(s % 100 == 0) dumper.Dump();
#endif //AKANTU_USE_IOHELPER
}
return EXIT_SUCCESS;
}

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