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test_solid_mechanics_model_implicit_2d.cc
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test_solid_mechanics_model_implicit_2d.cc
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/**
* @file test_solid_mechanics_model_implicit_2d.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Mon Feb 14 14:56:16 2011
*
* @brief test of traction in implicit
*
* @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.hh"
#endif //AKANTU_USE_IOHELPER
#ifdef AKANTU_USE_SCOTCH
#include "mesh_partition_scotch.hh"
#endif
#define bar_length 1
#define bar_height 1
// static void traction(__attribute__ ((unused)) double * position,double * stress){
// memset(stress,0,sizeof(akantu::Real)*4);
// if((fabs(position[1] - bar_height) < akantu::Math::tolerance) || (fabs(position[0] - bar_length) < akantu::Math::tolerance)) {
// stress[0] = 1000;
// stress[3] = 1000;
// }
// }
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
akantu::debug::setDebugLevel(akantu::dblWarning);
akantu::initialize(argc, argv);
akantu::UInt spatial_dimension = 2;
akantu::Mesh mesh(spatial_dimension);
akantu::StaticCommunicator & comm = akantu::StaticCommunicator::getStaticCommunicator();
akantu::Int psize = comm.getNbProc();
akantu::Int prank = comm.whoAmI();
akantu::MeshPartition * partition = NULL;
if(prank == 0) {
akantu::MeshIOMSH mesh_io;
mesh_io.read("square_implicit2.msh", mesh);
partition = new akantu::MeshPartitionScotch(mesh, spatial_dimension);
// partition->reorder();
partition->partitionate(psize);
}
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
model->initParallel(partition);
delete partition;
akantu::UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
/// 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->readMaterials("material.dat");
model->initMaterials();
model->initImplicit();
if (prank == 0)
std::cout << model->getMaterial(0) << std::endl;
/// boundary conditions
const akantu::Vector<akantu::Real> & position = mesh.getNodes();
akantu::Vector<bool> & boundary = model->getBoundary();
akantu::Vector<akantu::Real> & displacment = model->getDisplacement();
for (akantu::UInt n = 0; n < nb_nodes; ++n) {
if(position(n,0) < akantu::Math::getTolerance()) boundary(n,0) = true;
if(position(n,1) < akantu::Math::getTolerance()) boundary(n,1) = true;
if(std::abs(position(n,0) - bar_length) < akantu::Math::getTolerance()) {
boundary(n,0) = true;
displacment(n,0) = 0.1;
}
}
#ifdef AKANTU_USE_IOHELPER
akantu::ElementType type = akantu::_triangle_6;
iohelper::ElemType paraview_type = iohelper::TRIANGLE2;
akantu::UInt nb_element = model->getFEM().getMesh().getNbElement(type);
/// initialize the paraview output
iohelper::DumperParaview dumper;
dumper.SetMode(iohelper::TEXT);
dumper.SetParallelContext(prank, psize);
dumper.SetPoints(model->getFEM().getMesh().getNodes().values,
spatial_dimension, nb_nodes, "implicit");
dumper.SetConnectivity((int *)model->getFEM().getMesh().getConnectivity(type).values,
paraview_type, nb_element, iohelper::C_MODE);
dumper.AddNodeDataField(model->getDisplacement().values,
spatial_dimension, "displacements");
dumper.AddNodeDataField(model->getVelocity().values,
spatial_dimension, "velocity");
dumper.AddNodeDataField(model->getForce().values,
spatial_dimension, "applied_force");
dumper.AddNodeDataField(model->getResidual().values,
spatial_dimension, "forces");
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.SetEmbeddedValue("applied_force", 1);
dumper.SetEmbeddedValue("forces", 1);
dumper.SetPrefix("paraview/");
dumper.Init();
#endif //AKANTU_USE_IOHELPER
akantu::UInt count = 0;
model->updateResidual();
#ifdef AKANTU_USE_IOHELPER
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
akantu::Real norm;
model->assembleStiffnessMatrix();
while(!model->testConvergenceResidual(1e-3, norm) && (count < 100)) {
if (prank == 0)
std::cout << "Iter : " << ++count << " - residual norm : " << norm << std::endl;
model->solveStatic();
model->updateResidual();
};
#ifdef AKANTU_USE_IOHELPER
dumper.Dump();
#endif //AKANTU_USE_IOHELPER
delete model;
akantu::finalize();
return EXIT_SUCCESS;
}

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