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test_contact_search_explicit.cc
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rAKA akantu
test_contact_search_explicit.cc
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/**
* @file test_contact_search_explicit.cc
* @author David Kammer <david.kammer@epfl.ch>
* @date Fri Oct 7 16:15:48 2011
*
* @brief test contact search for all types
*
* @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 "mesh_utils.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
#include "contact.hh"
#include "contact_rigid.hh"
#include "contact_neighbor_structure.hh"
#include "regular_grid_neighbor_structure.hh"
#include "contact_search.hh"
#include "contact_search_explicit.hh"
#ifdef AKANTU_USE_IOHELPER
# include "io_helper_tools.hh"
#endif //AKANTU_USE_IOHELPER
using namespace akantu;
int main(int argc, char *argv[])
{
akantu::initialize(argc, argv);
debug::setDebugLevel(dblWarning);
const ElementType element_type = TYPE;
UInt dim = Mesh::getSpatialDimension(element_type);
/// load mesh
Mesh my_mesh(dim);
MeshIOMSH mesh_io;
std::stringstream meshname_sstr;
meshname_sstr << element_type << ".msh";
mesh_io.read(meshname_sstr.str().c_str(), my_mesh);
/// build facet connectivity and surface id
MeshUtils::buildFacets(my_mesh);
MeshUtils::buildSurfaceID(my_mesh);
UInt max_steps = 3;
unsigned int nb_nodes = my_mesh.getNbNodes();
/// declaration of model
SolidMechanicsModel my_model(my_mesh);
/// model initialization
my_model.initVectors();
my_model.getForce().clear();
my_model.getVelocity().clear();
my_model.getAcceleration().clear();
my_model.getDisplacement().clear();
Real * displacement = my_model.getDisplacement().values;
my_model.initExplicit();
my_model.initModel();
my_model.readMaterials("material.dat");
my_model.initMaterials();
/// dump facet and surface information to paraview
#ifdef AKANTU_USE_IOHELPER
iohelper::DumperParaview dumper;
paraviewInit(dumper, my_model, element_type, "para");
#endif //AKANTU_USE_IOHELPER
Real time_step = my_model.getStableTimeStep();
my_model.setTimeStep(time_step/10.);
my_model.assembleMassLumped();
/// contact declaration
Contact * contact = Contact::newContact(my_model,
_ct_rigid,
_cst_expli,
_cnst_regular_grid);
ContactRigid * my_contact = dynamic_cast<ContactRigid *>(contact);
my_contact->initContact(false);
Surface master = 0;
Surface impactor = 1;
my_contact->addMasterSurface(master);
my_contact->addImpactorSurfaceToMasterSurface(impactor, master);
my_model.updateCurrentPosition(); // neighbor structure uses current position for init
my_contact->initNeighborStructure(master);
/// define output file for testing
std::stringstream filename_sstr;
filename_sstr << "test_contact_search_explicit_" << element_type << ".out";
std::ofstream test_output;
test_output.open(filename_sstr.str().c_str());
/*
const NodesNeighborList & my_neighbor_list = dynamic_cast<const NodesNeighborList &>(my_contact->getContactSearch().getContactNeighborStructure(master).getNeighborList());
UInt nb_nodes_neigh = my_neighbor_list.impactor_nodes.getSize();
Vector<UInt> impact_nodes = my_neighbor_list.impactor_nodes;
UInt * impact_nodes_val = impact_nodes.values;
UInt * master_nodes_offset_val = my_neighbor_list.master_nodes_offset.values;
UInt * master_nodes_val = my_neighbor_list.master_nodes.values;
/// print impactor nodes
test_output << "we have " << nb_nodes_neigh << " impactor nodes:";
for (UInt i = 0; i < nb_nodes_neigh; ++i) {
test_output << " " << impact_nodes_val[i];
}
test_output << std::endl;
for (UInt i = 0; i < nb_nodes_neigh; ++i) {
test_output << " Impactor node: " << impact_nodes_val[i] << " has master nodes:";
for(UInt mn = master_nodes_offset_val[i]; mn < master_nodes_offset_val[i+1]; ++mn) {
test_output << " " << master_nodes_val[mn];
}
test_output << std::endl;
}
*/
my_contact->initSearch(); // does nothing so far
/* ------------------------------------------------------------------------ */
/* Main loop */
/* ------------------------------------------------------------------------ */
for(UInt s = 1; s <= max_steps; ++s) {
test_output << std::endl << "passing step " << s << "/" << max_steps << std::endl;
/// apply a displacement to the slave body
if(s == 2) {
Real * coord = my_mesh.getNodes().values;
for(UInt n = 0; n < nb_nodes; ++n) {
if(coord[n*dim + 0] > 0.5) {
displacement[n*dim+0] = -0.02;
}
}
}
/// integration
my_model.explicitPred();
my_model.initializeUpdateResidualData();
/// compute the penetration list
test_output << "Before solveContact" << std::endl;
PenetrationList * my_penetration_list = new PenetrationList("penetration_list_1");
const_cast<ContactSearch &>(my_contact->getContactSearch()).findPenetration(master, *my_penetration_list);
UInt nb_nodes_pen = my_penetration_list->penetrating_nodes.getSize();
Vector<UInt> pen_nodes = my_penetration_list->penetrating_nodes;
UInt * pen_nodes_val = pen_nodes.values;
test_output << "we have " << nb_nodes_pen << " penetrating nodes:" << std::endl;
for (UInt i = 0; i < nb_nodes_pen; ++i) {
test_output << "node " << pen_nodes_val[i] << " with disp:";
for (UInt j=0; j<dim; ++j)
test_output << " " << std::setprecision(10) << displacement[pen_nodes_val[i]*dim+j];
test_output << std::endl;
}
test_output << std::endl;
delete my_penetration_list;
/// solve contact
my_contact->solveContact();
/// compute the penetration list
test_output << "After solveContact" << std::endl;
PenetrationList * my_penetration_list_2 = new PenetrationList("penetration_list_2");
const_cast<ContactSearch &>(my_contact->getContactSearch()).findPenetration(master, *my_penetration_list_2);
UInt nb_nodes_pen_2 = my_penetration_list_2->penetrating_nodes.getSize();
Vector<UInt> pen_nodes_2 = my_penetration_list_2->penetrating_nodes;
UInt * pen_nodes_2_val = pen_nodes_2.values;
test_output << "we have " << nb_nodes_pen_2 << " penetrating nodes:";
for (UInt i = 0; i < nb_nodes_pen_2; ++i)
test_output << " " << pen_nodes_2_val[i];
test_output << std::endl;
delete my_penetration_list_2;
/// further integration
my_model.updateResidual(false);
my_contact->avoidAdhesion();
my_model.updateAcceleration();
my_model.explicitCorr();
#ifdef AKANTU_USE_IOHELPER
paraviewDump(dumper);
#endif //AKANTU_USE_IOHELPER
}
delete my_contact;
finalize();
return EXIT_SUCCESS;
}
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