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test_solid_mechanics_model.cc
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rAKA akantu
test_solid_mechanics_model.cc
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/**
* @file test_solid_mechanics_model.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Fri Sep 03 15:56:56 2010
*
* @brief test of the class SolidMechanicsModel
*
* @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 "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
#include "fe_engine.hh"
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.hh"
#endif //AKANTU_USE_IOHELPER
using namespace akantu;
int main(int argc, char *argv[])
{
akantu::initialize(argc, argv);
UInt max_steps = 1;
Real epot, ekin;
Mesh mesh(2);
MeshIOMSH mesh_io;
mesh_io.read("triangle.msh", mesh);
mesh.getBlockedDOFs().createBoundariesFromGeometry();
SolidMechanicsModel * model = new SolidMechanicsModel(mesh);
/// model initialization
model->initArrays();
UInt nb_nodes = model->getFEEngine().getMesh().getNbNodes();
memset(model->getForce().storage(), 0, 2*nb_nodes*sizeof(Real));
memset(model->getVelocity().storage(), 0, 2*nb_nodes*sizeof(Real));
memset(model->getAcceleration().storage(), 0, 2*nb_nodes*sizeof(Real));
memset(model->getDisplacement().storage(), 0, 2*nb_nodes*sizeof(Real));
model->readMaterials("material.dat");
model->initMaterials();
model->initModel();
Real time_step = model->getStableTimeStep();
model->setTimeStep(time_step/10.);
model->assembleMass();
std::cout << *model << std::endl;
/// boundary conditions
// Real eps = 1e-16;
// for (UInt i = 0; i < nb_nodes; ++i) {
// model->getDisplacement().storage()[2*i] = model->getFEEngine().getMesh().getNodes().storage()[2*i] / 100.;
// if(model->getFEEngine().getMesh().getNodes().storage()[2*i] <= eps) {
// model->getBlockedDOFs().storage()[2*i ] = true;
// if(model->getFEEngine().getMesh().getNodes().storage()[2*i + 1] <= eps)
// model->getBlockedDOFs().storage()[2*i + 1] = true;
// }
// if(model->getFEEngine().getMesh().getNodes().storage()[2*i + 1] <= eps) {
// model->getBlockedDOFs().storage()[2*i + 1] = true;
// }
// }
// Boundary condition (Neumann)
Matrix<Real> stress(2,2);
stress.eye(1e3);
model.applyBC(BC::Neumann::FromHigherDim(stress), "0");
// const Mesh::ConnectivityTypeList & type_list = fem_boundary.getMesh().getConnectivityTypeList();
// Mesh::ConnectivityTypeList::const_iterator it;
// for(it = type_list.begin(); it != type_list.end(); ++it) {
// if(Mesh::getSpatialDimension(*it) != fem_boundary.getElementDimension()) continue;
// // ElementType facet_type = Mesh::getFacetElementType(*it);
// UInt nb_nodes_per_element = Mesh::getNbNodesPerElement(*it);
// UInt nb_quad = FEEngine::getNbQuadraturePoints(*it);
// UInt nb_element;
// const Array<Real> * shapes;
// Array<Real> quad_coords(0,2,"quad_coords");
// const Array<Real> * normals_on_quad;
// nb_element = fem_boundary.getMesh().getNbElement(*it);
// fem_boundary.interpolateOnQuadraturePoints(mesh.getNodes(), quad_coords, 2, _segment_2);
// normals_on_quad = &(fem_boundary.getNormalsOnQuadPoints(*it));
// shapes = &(fem_boundary.getShapes(*it));
// Array<Real> * sigma_funct = new Array<Real>(nb_element, 4*nb_quad, "myfunction");
// Array<Real> * funct = new Array<Real>(nb_element, 2*nb_quad, "myfunction");
// Real * sigma_funct_val = sigma_funct->storage();
// Real * shapes_val = shapes->storage();
// /// compute t * \phi_i for each nodes of each element
// for (UInt el = 0; el < nb_element; ++el) {
// for (UInt q = 0; q < nb_quad; ++q) {
// trac(quad_coords.storage()+el*nb_quad*2+q,sigma_funct_val);
// sigma_funct_val += 4;
// }
// }
// Math::matrix_vector(2,2,*sigma_funct,*normals_on_quad,*funct);
// funct->extendComponentsInterlaced(nb_nodes_per_element,2);
// Real * funct_val = funct->storage();
// for (UInt el = 0; el < nb_element; ++el) {
// for (UInt q = 0; q < nb_quad; ++q) {
// for (UInt n = 0; n < nb_nodes_per_element; ++n) {
// *funct_val++ *= *shapes_val;
// *funct_val++ *= *shapes_val++;
// }
// }
// }
// Array<Real> * int_funct = new Array<Real>(nb_element, 2*nb_nodes_per_element,
// "inte_funct");
// fem_boundary.integrate(*funct, *int_funct, 2*nb_nodes_per_element, *it);
// delete funct;
// fem_boundary.assembleArray(*int_funct,model->getForce(), 2, *it);
// delete int_funct;
// }
// model->getDisplacement().storage()[1] = 0.1;
#ifdef AKANTU_USE_IOHELPER
iohelper::DumperParaview dumper;
dumper.SetMode(iohelper::TEXT);
dumper.SetPoints(model->getFEEngine().getMesh().getNodes().storage(), 2, nb_nodes, "coordinates");
dumper.SetConnectivity((int *)model->getFEEngine().getMesh().getConnectivity(_triangle_3).storage(),
iohelper::TRIANGLE1, model->getFEEngine().getMesh().getNbElement(_triangle_3), iohelper::C_MODE);
dumper.AddNodeDataField(model->getDisplacement().storage(), 2, "displacements");
dumper.AddNodeDataField(model->getVelocity().storage(), 2, "velocity");
dumper.AddNodeDataField(model->getForce().storage(), 2, "force");
dumper.AddNodeDataField(model->getResidual().storage(), 2, "residual");
dumper.AddElemDataField(model->getMaterial(0).getStrain(_triangle_3).storage(), 4, "strain");
dumper.AddElemDataField(model->getMaterial(0).getStress(_triangle_3).storage(), 4, "stress");
dumper.SetEmbeddedValue("displacements", 1);
dumper.SetEmbeddedValue("force", 1);
dumper.SetPrefix("paraview/");
dumper.Init();
#endif //AKANTU_USE_IOHELPER
model->setPotentialEnergyFlagOn();
for(UInt s = 0; s < max_steps; ++s) {
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
epot = model->getPotentialEnergy();
ekin = model->getKineticEnergy();
std::cout << s << " " << epot << " " << ekin << " " << epot + ekin
<< std::endl;
#ifdef AKANTU_USE_IOHELPER
if(s % 10 == 0) dumper.Dump();
#endif //AKANTU_USE_IOHELPER
}
return EXIT_SUCCESS;
}
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