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test_dcb_2d.cc
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/**
* @file test_dcb_2d.cc
* @author Fabian Barras <fabian.barras@epfl.ch>
* @date Wed Sep 19 14:28:27 2014
*
* @brief 2D DCB test to verify the convergence to a same solution
*
* @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 <iostream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "mesh_utils.hh"
#include "solid_mechanics_model_cohesive.hh"
#include "material.hh"
#include "material_cohesive.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char *argv[]) {
std::cout << " ./test_dcb_2d <final opening> <nb steps> [ <bool_dump>=true <paraview_folder>=test_dcb_2d ] " << std::endl;
//debug::setDebugLevel(dblWarning);
initialize("input_test.dat", argc, argv);
// Math::setTolerance(1.e-13);
Real tolerance = Math::getTolerance();
const UInt spatial_dimension = 2;
const Real final_opening =std::atof(argv[1]);
const UInt step = std::atoi(argv[2]);
bool bool_dump = true;
std::string simulation_name = "test_dcb_2d";
if (argc > 3) bool_dump = std::atoi(argv[3]);
if (argc > 4) simulation_name = argv[4];
std::cout << "final opening = " << final_opening << " nb_steps = " << step;
if (bool_dump) std::cout << " paraview_folder: paraview/" << simulation_name << std::endl;
else std::cout << std::endl;
Mesh mesh(spatial_dimension);
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
Int psize = comm.getNbProc();
Int prank = comm.whoAmI();
akantu::MeshPartition * partition = NULL;
if(prank==0){
mesh.read("mesh_dcb_2d.msh");
//CohesiveElementInserter inserter(mesh);
//inserter.setLimit(_y, -1e-8, 1e-8);
//inserter.insertIntrinsicElements();
partition = new MeshPartitionScotch(mesh, spatial_dimension);
partition->partitionate(psize);
}
SolidMechanicsModelCohesive model(mesh);
model.initParallel(partition);
model.initFull(SolidMechanicsModelCohesiveOptions(_static));
model.limitInsertion(_y, -1e-8, 1e-8);
model.insertIntrinsicElements();
mesh.createGroupsFromMeshData<std::string>("physical_names");
const Array<Real> & nodes = mesh.getNodes();
Array<UInt> top_boundary_nodes, bot_boundary_nodes;
Array<bool> & blockedDOFs = model.getBlockedDOFs();
Array<Real> & displacement = model.getDisplacement();
UInt nb_nodes = mesh.getNbNodes();
for (UInt i = 0; i < nb_nodes; ++i) {
if(std::abs(nodes(i,0)-1)<tolerance){
if((nodes(i,1)>0.)&&((nodes(i,1)<0.02))){
top_boundary_nodes.push_back(i);
blockedDOFs(i,1) = true;
std::cout << "+"<< std::endl;
} else if ((nodes(i,1)<0.)&&((nodes(i,1)>-0.02))){
bot_boundary_nodes.push_back(i);
blockedDOFs(i,1) = true;
std::cout << "-"<< std::endl;
}
}
if (std::abs(nodes(i,0)) < tolerance) {
blockedDOFs(i,0) = true;
blockedDOFs(i,1) = true;
}
}
model.synchronizeBoundaries();
model.updateResidual();
std::cout << mesh.getNbElement(_cohesive_2d_6) << std::endl;
if (bool_dump) {
std::stringstream paraview_folder;
paraview_folder << "paraview"
<<"/"
<< simulation_name
<< "/";
model.setDirectory(paraview_folder.str());
model.setBaseName("bulk");
model.addDumpFieldVector("displacement");
model.addDumpField("stress");
model.addDumpField("partitions");
//model.addDumpField("strain");
model.dump();
model.setDirectoryToDumper("cohesive elements", "test_unique");
model.setBaseNameToDumper("cohesive elements", "one_cohesive_element");
model.addDumpFieldVectorToDumper("cohesive elements", "displacement");
model.dump("cohesive elements");
}
model.assembleStiffnessMatrix();
Real opening = final_opening/step;
std::ofstream node_f;
node_f.open("/home/fabarras/clement_outputs/node_coords.out");
std::ofstream displ_f;
displ_f.open("/home/fabarras/clement_outputs/displ.out");
for (UInt n = 0; n < nb_nodes; ++n) {
for (UInt d = 0; d < spatial_dimension; ++d) {
node_f << nodes(n,d) << " ";
}
node_f << std::endl;
}
for (UInt stp = 0; stp <step; ++stp) {
std::cout << stp << std::endl;
for (UInt i = 0; i < top_boundary_nodes.getSize(); ++i) {
displacement(top_boundary_nodes(i),1) += opening;
}
for (UInt i = 0; i < bot_boundary_nodes.getSize(); ++i) {
displacement(bot_boundary_nodes(i),1) -= opening;
}
Real error;
model.solveStep<_scm_newton_raphson_tangent, _scc_increment>(1e-8, error, 500);
std::cout << "Error after convergence: " << error << std::endl;
if (bool_dump){
model.dump();
model.dump("cohesive elements");
}
if (stp%5 == 0) {
for (UInt n = 0; n < nb_nodes; ++n) {
for (UInt d = 0; d < spatial_dimension; ++d) {
displ_f << displacement(n,d) << " ";
}
}
std::cout << stp << std::endl;
}
}
node_f.close();
displ_f.close();
finalize();
return EXIT_SUCCESS;
}

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