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rAKA/test/test_solid_mechanics_model/test_solid_mechanics_model.cc
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test_solid_mechanics_model.cc
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/**
* @file test_solid_mechanics_model.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Tue Jul 27 14:34:13 2010
*
* @brief test of the class SolidMechanicsModel
*
* @section LICENSE
*
* <insert license here>
*
*/
/* -------------------------------------------------------------------------- */
#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 "fem.hh"
/* -------------------------------------------------------------------------- */
#ifdef AKANTU_USE_IOHELPER
# include "io_helper.h"
#endif //AKANTU_USE_IOHELPER
using namespace akantu;
void trac(double * position,double * traction){
memset(traction,0,sizeof(Real)*4);
traction[0] = 1000;
traction[3] = 1000;
// if(fabs(position[0])< 1e-4){
// traction[0] = -position[1];
// }
}
int main(int argc, char *argv[])
{
UInt max_steps = 1;
Real epot, ekin;
Mesh mesh(2);
MeshIOMSH mesh_io;
mesh_io.read("triangle.msh", mesh);
SolidMechanicsModel * model = new SolidMechanicsModel(mesh);
/// model initialization
model->initVectors();
UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
memset(model->getForce().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getVelocity().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getAcceleration().values, 0, 2*nb_nodes*sizeof(Real));
memset(model->getDisplacement().values, 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().values[2*i] = model->getFEM().getMesh().getNodes().values[2*i] / 100.;
// if(model->getFEM().getMesh().getNodes().values[2*i] <= eps) {
// model->getBoundary().values[2*i ] = true;
// if(model->getFEM().getMesh().getNodes().values[2*i + 1] <= eps)
// model->getBoundary().values[2*i + 1] = true;
// }
// if(model->getFEM().getMesh().getNodes().values[2*i + 1] <= eps) {
// model->getBoundary().values[2*i + 1] = true;
// }
// }
FEM & fem_boundary = model->getFEMBoundary();
fem_boundary.initShapeFunctions();
fem_boundary.computeNormalsOnQuadPoints();
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 = FEM::getNbQuadraturePoints(*it);
UInt nb_element;
const Vector<Real> * shapes;
Vector<Real> quad_coords(0,2,"quad_coords");
const Vector<Real> * normals_on_quad;
nb_element = fem_boundary.getMesh().getNbElement(*it);
fem_boundary.interpolateOnQuadraturePoints(mesh.getNodes(), quad_coords, 2, _line_1);
normals_on_quad = &(fem_boundary.getNormalsOnQuadPoints(*it));
shapes = &(fem_boundary.getShapes(*it));
Vector<Real> * sigma_funct = new Vector<Real>(nb_element, 4*nb_quad, "myfunction");
Vector<Real> * funct = new Vector<Real>(nb_element, 2*nb_quad, "myfunction");
Real * sigma_funct_val = sigma_funct->values;
Real * shapes_val = shapes->values;
/// 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.values+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->values;
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++;
}
}
}
Vector<Real> * int_funct = new Vector<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.assembleVector(*int_funct,model->getForce(), 2, *it);
delete int_funct;
}
// model->getDisplacement().values[1] = 0.1;
#ifdef AKANTU_USE_IOHELPER
DumperParaview dumper;
dumper.SetMode(TEXT);
dumper.SetPoints(model->getFEM().getMesh().getNodes().values, 2, nb_nodes, "coordinates");
dumper.SetConnectivity((int *)model->getFEM().getMesh().getConnectivity(_triangle_1).values,
TRIANGLE1, model->getFEM().getMesh().getNbElement(_triangle_1), C_MODE);
dumper.AddNodeDataField(model->getDisplacement().values, 2, "displacements");
dumper.AddNodeDataField(model->getVelocity().values, 2, "velocity");
dumper.AddNodeDataField(model->getForce().values, 2, "force");
dumper.AddNodeDataField(model->getResidual().values, 2, "residual");
dumper.AddElemDataField(model->getMaterial(0).getStrain(_triangle_1).values, 4, "strain");
dumper.AddElemDataField(model->getMaterial(0).getStress(_triangle_1).values, 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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