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test_solid_mechanics_model_bar_traction2d_structured.cc
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test_solid_mechanics_model_bar_traction2d_structured.cc
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/**
* @file test_solid_mechanics_model_bar_traction2d_structured.cc
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Dec 13 2010
* @date last modification: Thu Jun 05 2014
*
* @brief test of the class SolidMechanicsModel
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 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 "solid_mechanics_model.hh"
int main(int argc, char *argv[]) {
akantu::initialize("material.dat", 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);
mesh.read("bar_structured1.msh");
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
/// model initialization
model->initFull();
std::cout << model->getMaterial(0) << std::endl;
/// boundary conditions
akantu::Real eps = 1e-16;
for (akantu::UInt i = 0; i < mesh.getNbNodes(); ++i) {
if(mesh.getNodes()(i) >= 9)
model->getDisplacement()(i) = (model->getFEEngine().getMesh().getNodes()(i) - 9) / 100. ;
if(mesh.getNodes()(i) <= eps)
model->getBlockedDOFs()(i) = true;
if(mesh.getNodes()(i, 1) <= eps ||
mesh.getNodes()(i, 1) >= 1 - eps ) {
model->getBlockedDOFs()(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_bar_2d_structured.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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