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test_material_elastic_caughey.cc
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Tue, Jun 4, 16:24

test_material_elastic_caughey.cc
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/**
* @file test_material_elastic_caughey.cc
* @author David Kammer <david.kammer@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Wed May 4 16:22:17 2011
*
* @brief test of the material elastic caughey
*
* @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 "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.h"
#endif //AKANTU_USE_IOHELPER
int main(int argc, char *argv[])
{
#ifdef AKANTU_USE_IOHELPER
akantu::ElementType type = akantu::_triangle_3;
#endif //AKANTU_USE_IOHELPER
akantu::UInt spatial_dimension = 2;
akantu::UInt max_steps = 5000;
akantu::Real time_factor = 0.8;
akantu::initialize(&argc, &argv);
akantu::debug::setDebugLevel(akantu::dblWarning);
// akantu::Real epot, ekin;
akantu::Mesh mesh(spatial_dimension);
akantu::MeshIOMSH mesh_io;
mesh_io.read("bar.msh", mesh);
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
akantu::UInt nb_nodes = mesh.getNbNodes();
#ifdef AKANTU_USE_IOHELPER
akantu::UInt nb_element = mesh.getNbElement(type);
#endif //AKANTU_USE_IOHELPER
/* ------------------------------------------------------------------------ */
/* Initialization */
/* ------------------------------------------------------------------------ */
/// model initialization
model->initVectors();
/// set vectors to 0
memset(model->getForce().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getResidual().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->initModel();
model->readMaterials("material_elastic_caughey.dat");
model->initMaterials();
std::cout << model->getMaterial(0) << std::endl;
model->assembleMassLumped();
/* ------------------------------------------------------------------------ */
/* Boundary + initial conditions */
/* ------------------------------------------------------------------------ */
akantu::Real eps = 1e-16;
for (akantu::UInt i = 0; i < nb_nodes; ++i) {
// model->getDisplacement().values[spatial_dimension*i]
// = mesh.getNodes().values[spatial_dimension*i] / 100.;
if(mesh.getNodes().values[spatial_dimension*i] >= 9.9)
model->getDisplacement().values[spatial_dimension*i]
= (mesh.getNodes().values[spatial_dimension*i] - 9) / 100. / 5.;
if(mesh.getNodes().values[spatial_dimension*i] <= eps)
model->getBoundary().values[spatial_dimension*i] = true;
if(mesh.getNodes().values[spatial_dimension*i + 1] <= eps ||
mesh.getNodes().values[spatial_dimension*i + 1] >= 1 - eps ) {
model->getBoundary().values[spatial_dimension*i + 1] = true;
}
}
model->synchronizeBoundaries();
#ifdef AKANTU_USE_IOHELPER
DumperParaview dumper;
dumper.SetMode(TEXT);
dumper.SetPoints(mesh.getNodes().values,
spatial_dimension, nb_nodes, "bar2d_mat_caughey");
dumper.SetConnectivity((int *)mesh.getConnectivity(type).values,
TRIANGLE1, nb_element, C_MODE);
dumper.AddNodeDataField(model->getDisplacement().values,
spatial_dimension, "displacements");
dumper.AddNodeDataField(model->getMass().values,
1, "mass");
dumper.AddNodeDataField(model->getVelocity().values,
spatial_dimension, "velocity");
dumper.AddNodeDataField(model->getResidual().values,
spatial_dimension, "force");
dumper.AddNodeDataField(model->getAcceleration().values,
spatial_dimension, "acceleration");
dumper.AddElemDataField(model->getMaterial(0).getStrain(type).values,
spatial_dimension*spatial_dimension, "strain");
dumper.AddElemDataField(model->getMaterial(0).getStress(type).values,
spatial_dimension*spatial_dimension, "stress");
dumper.AddElemDataField(dynamic_cast<akantu::MaterialElasticCaughey & >(model->getMaterial(0)).getStressViscosity(type).values,
spatial_dimension*spatial_dimension, "stress_visc");
dumper.AddElemDataField(dynamic_cast<akantu::MaterialElasticCaughey & >(model->getMaterial(0)).getStressElastic(type).values,
spatial_dimension*spatial_dimension, "stress_el");
dumper.SetEmbeddedValue("displacements", 1);
dumper.SetPrefix("paraview/");
dumper.Init();
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
std::ofstream energy;
energy.open("energy.csv");
energy << "id,epot,ekin,tot" << std::endl;
/// Setting time step
akantu::Real time_step = model->getStableTimeStep() * time_factor;
std::cout << "Time Step = " << time_step << "s" << std::endl;
model->setTimeStep(time_step);
/* ------------------------------------------------------------------------ */
/* Main loop */
/* ------------------------------------------------------------------------ */
for(akantu::UInt s = 1; s <= max_steps; ++s) {
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
akantu::Real epot = model->getPotentialEnergy();
akantu::Real ekin = model->getKineticEnergy();
if(s % 10 == 0) {
std::cerr << "passing step " << s << "/" << max_steps << std::endl;
energy << s << "," << epot << "," << ekin << "," << epot + ekin
<< std::endl;
}
#ifdef AKANTU_USE_IOHELPER
if(s % 10 == 0) {
dumper.Dump();
}
#endif //AKANTU_USE_IOHELPER
}
delete model;
// akantu::finalize();
return EXIT_SUCCESS;
}

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