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test_solid_mechanics_model_bar_traction2d_structured.cc
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Tue, Aug 27, 14:32

test_solid_mechanics_model_bar_traction2d_structured.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 <limits>
#include <fstream>
#include <iostream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.hh"
#endif //AKANTU_USE_IOHELPER
int main(int argc, char *argv[])
{
akantu::initialize(argc, argv);
akantu::UInt spatial_dimension = 2;
akantu::UInt max_steps = 10000;
akantu::Real time_factor = 0.2;
akantu::Real epot, ekin;
akantu::Mesh mesh(spatial_dimension);
akantu::MeshIOMSH mesh_io;
mesh_io.read("bar_structured1.msh", mesh);
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
/// model initialization
model->initVectors();
/// set vectors to 0
akantu::UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
memset(model->getForce().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getVelocity().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getAcceleration().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getDisplacement().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
model->initExplicit();
model->initModel();
model->readMaterials("material.dat");
model->initMaterials();
std::cout << model->getMaterial(0) << std::endl;
model->assembleMassLumped();
/// boundary conditions
akantu::Real eps = 1e-16;
for (akantu::UInt i = 0; i < nb_nodes; ++i) {
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i] >= 9)
model->getDisplacement().values[spatial_dimension*i] = (model->getFEM().getMesh().getNodes().values[spatial_dimension*i] - 9) / 100. ;
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] >= 1 - eps ) {
model->getBoundary().values[spatial_dimension*i + 1] = true;
}
}
akantu::Real time_step = model->getStableTimeStep() * time_factor;
std::cout << "Time Step = " << time_step << "s" << std::endl;
model->setTimeStep(time_step);
std::ofstream energy;
energy.open("energy.csv");
energy << "id,epot,ekin,tot" << std::endl;
for(akantu::UInt s = 1; s <= max_steps; ++s) {
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
epot = model->getPotentialEnergy();
ekin = model->getKineticEnergy();
std::cerr << "passing step " << s << "/" << max_steps << std::endl;
energy << s << "," << epot << "," << ekin << "," << epot + ekin
<< std::endl;
}
energy.close();
return EXIT_SUCCESS;
}

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