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3d_cube_compression.cc
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3d_cube_compression.cc
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/**
* @file 3d_cube_compression.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Wed Nov 24 23:15:47 2010
*
* @brief 3d cube compression
*
* @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"
#include "static_communicator.hh"
#include "distributed_synchronizer.hh"
#include "mesh_partition_scotch.hh"
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.h"
#endif //AKANTU_USE_IOHELPER
int main(int argc, char *argv[])
{
akantu::ElementType type = akantu::_tetrahedron_4;
#ifdef AKANTU_USE_IOHELPER
akantu::UInt paraview_type = TETRA1;
#endif //AKANTU_USE_IOHELPER
akantu::UInt spatial_dimension = 3;
akantu::UInt max_steps = 100;
akantu::Real time_step = 1e-6;
akantu::initialize(&argc, &argv);
akantu::StaticCommunicator * comm = akantu::StaticCommunicator::getStaticCommunicator();
akantu::Int psize = comm->getNbProc();
akantu::Int prank = comm->whoAmI();
// akantu::Real epot, ekin;
akantu::Mesh mesh(spatial_dimension);
akantu::MeshPartition * partition = NULL;
if(prank == 0) {
akantu::MeshIOMSH mesh_io;
mesh_io.read("cube.msh", mesh);
partition = new akantu::MeshPartitionScotch(mesh, spatial_dimension);
partition->partitionate(psize);
}
// akantu::Mesh mesh(spatial_dimension);
// akantu::MeshIOMSH mesh_io;
// mesh_io.read("cube.msh", mesh);
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
model->initParallel(partition);
akantu::UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
akantu::UInt nb_element = model->getFEM().getMesh().getNbElement(type);
std::cout << "Nb nodes : " << nb_nodes << " - nb elements : " << nb_element << std::endl;
/// model initialization
model->initVectors();
/// set vectors to 0
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->initModel();
model->initExplicit();
model->readMaterials("material.dat");
model->initMaterials();
std::cout << model->getMaterial(0) << std::endl;
model->assembleMassLumped();
#ifdef AKANTU_USE_IOHELPER
/// set to 0 only for the first paraview dump
memset(model->getResidual().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getMaterial(0).getStrain(type).values, 0,
spatial_dimension*spatial_dimension*nb_element*sizeof(akantu::Real));
memset(model->getMaterial(0).getStress(type).values, 0,
spatial_dimension*spatial_dimension*nb_element*sizeof(akantu::Real));
#endif //AKANTU_USE_IOHELPER
/// 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(fabs(model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 2] - 1) <= eps)
model->getForce().values[spatial_dimension*i + 2] = -250;
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 2] <= eps)
model->getBoundary().values[spatial_dimension*i + 2] = true;
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 0] <= eps) {
model->getBoundary().values[spatial_dimension*i + 0] = true;
}
}
// akantu::Real time_step = model->getStableTimeStep() * time_factor;
std::cout << "Time Step = " << time_step << "s" << std::endl;
model->setTimeStep(time_step);
// model->setTimeStep(3.54379e-07);
#ifdef AKANTU_USE_IOHELPER
DumperParaview dumper;
dumper.SetMode(TEXT);
dumper.SetPoints(model->getFEM().getMesh().getNodes().values,
spatial_dimension, nb_nodes, "coordinates");
dumper.SetConnectivity((int *)model->getFEM().getMesh().getConnectivity(type).values,
paraview_type, nb_element, C_MODE);
dumper.AddNodeDataField(model->getDisplacement().values,
spatial_dimension, "displacements");
dumper.AddNodeDataField(model->getVelocity().values,
spatial_dimension, "velocity");
dumper.AddNodeDataField(model->getResidual().values,
spatial_dimension, "force");
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.SetEmbeddedValue("displacements", 1);
dumper.SetPrefix("paraview/");
dumper.Init();
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
double total_time = 0.;
for(akantu::UInt s = 1; s <= max_steps; ++s) {
double start = MPI_Wtime();
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
double end = MPI_Wtime();
total_time += end - start;
#ifdef AKANTU_USE_IOHELPER
if(s % 1 == 0) dumper.Dump();
#endif //AKANTU_USE_IOHELPER
if(s % 10 == 0) std::cout << "passing step " << s << "/" << max_steps << std::endl;
}
if(prank == 0) std::cout << "Time : " << psize << " " << total_time / max_steps << " " << total_time << std::endl;
akantu::finalize();
return EXIT_SUCCESS;
}

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