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test_solid_mechanics_model_bar_traction2d.cc
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test_solid_mechanics_model_bar_traction2d.cc
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/**
* @file test_solid_mechanics_model_bar_traction2d.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Mon Aug 09 2010
* @date last modification: Thu Aug 06 2015
*
* @brief test of the class SolidMechanicsModel
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 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 <fstream>
#include <iostream>
#include <limits>
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
initialize("material.dat", argc, argv);
UInt max_steps = 5000;
Real time_factor = 0.8;
UInt spatial_dimension = 2;
Mesh mesh(spatial_dimension);
mesh.read("bar2.msh");
SolidMechanicsModel model(mesh);
UInt nb_nodes = mesh.getNbNodes();
/// model initialization
model.initFull();
std::cout << model.getMaterial(0) << std::endl;
/// boundary conditions
Real eps = 1e-16;
const Array<Real> & pos = mesh.getNodes();
Array<Real> & disp = model.getDisplacement();
Array<bool> & boun = model.getBlockedDOFs();
for (UInt i = 0; i < nb_nodes; ++i) {
if (pos(i, 0) >= 9.)
disp(i, 0) = (pos(i, 0) - 9) / 100.;
if (pos(i) <= eps)
boun(i, 0) = true;
if (pos(i, 1) <= eps || pos(i, 1) >= 1 - eps)
boun(i, 1) = true;
}
/// set the time step
Real time_step = model.getStableTimeStep() * time_factor;
std::cout << "Time Step = " << time_step << "s" << std::endl;
model.setTimeStep(time_step);
/// initialize the paraview output
mesh.setBaseName("bar_traction_2d");
model.addDumpField("displacement");
model.addDumpField("mass");
model.addDumpField("velocity");
model.addDumpField("acceleration");
model.addDumpField("external_force");
model.addDumpField("internal_force");
model.addDumpFieldTensor("stress");
model.addDumpField("grad_u");
model.addDumpGroupField("displacement", "Top");
model.dumpGroup("Top");
model.dump();
std::ofstream energy;
energy.open("energy_bar_2d.csv");
energy << "id,rtime,epot,ekin,tot" << std::endl;
for (UInt s = 1; s <= max_steps; ++s) {
model.solveStep();
Real epot = model.getEnergy("potential");
Real ekin = model.getEnergy("kinetic");
energy << s << "," << (s - 1) * time_step << "," << epot << "," << ekin
<< "," << epot + ekin << std::endl;
#ifdef AKANTU_USE_IOHELPER
if (s % 100 == 0) {
model.dump();
model.dumpGroup();
}
#endif // AKANTU_USE_IOHELPER
if (s % 100 == 0)
std::cout << "passing step " << s << "/" << max_steps << std::endl;
}
energy.close();
finalize();
return EXIT_SUCCESS;
}

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