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test_cohesive_parallel_extrinsic.cc
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Tue, May 21, 14:30

test_cohesive_parallel_extrinsic.cc
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/**
* @file test_cohesive_parallel_extrinsic.cc
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Wed Nov 05 2014
* @date last modification: Wed Nov 08 2017
*
* @brief parallel test for cohesive elements
*
* @section LICENSE
*
* Copyright (©) 2015-2018 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 "dumper_paraview.hh"
#include "solid_mechanics_model_cohesive.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
initialize("material.dat", argc, argv);
const UInt max_steps = 500;
UInt spatial_dimension = 2;
Mesh mesh(spatial_dimension);
const auto & comm = Communicator::getStaticCommunicator();
Int psize = comm.getNbProc();
Int prank = comm.whoAmI();
akantu::MeshPartition * partition = NULL;
if (prank == 0) {
// Read the mesh
mesh.read("mesh.msh");
/// partition the mesh
partition = new MeshPartitionScotch(mesh, spatial_dimension);
// debug::setDebugLevel(dblDump);
partition->partitionate(psize);
// debug::setDebugLevel(dblWarning);
}
SolidMechanicsModelCohesive model(mesh);
model.initParallel(partition, NULL, true);
// debug::setDebugLevel(dblDump);
// std::cout << mesh << std::endl;
// debug::setDebugLevel(dblWarning);
model.initFull(
SolidMechanicsModelCohesiveOptions(_explicit_lumped_mass, true));
model.limitInsertion(_y, -0.30, -0.20);
model.updateAutomaticInsertion();
// debug::setDebugLevel(dblDump);
// std::cout << mesh_facets << std::endl;
// debug::setDebugLevel(dblWarning);
Real time_step = model.getStableTimeStep() * 0.1;
model.setTimeStep(time_step);
std::cout << "Time step: " << time_step << std::endl;
model.assembleMassLumped();
Array<Real> & position = mesh.getNodes();
Array<Real> & velocity = model.getVelocity();
Array<bool> & boundary = model.getBlockedDOFs();
Array<Real> & displacement = model.getDisplacement();
// const Array<Real> & residual = model.getResidual();
UInt nb_nodes = mesh.getNbNodes();
/// boundary conditions
for (UInt n = 0; n < nb_nodes; ++n) {
if (position(n, 1) > 0.99 || position(n, 1) < -0.99)
boundary(n, 1) = true;
if (position(n, 0) > 0.99 || position(n, 0) < -0.99)
boundary(n, 0) = true;
}
/// initial conditions
Real loading_rate = 0.5;
Real disp_update = loading_rate * time_step;
for (UInt n = 0; n < nb_nodes; ++n) {
velocity(n, 1) = loading_rate * position(n, 1);
}
model.synchronizeBoundaries();
model.updateResidual();
model.setBaseName("extrinsic_parallel");
model.addDumpFieldVector("displacement");
model.addDumpField("velocity");
model.addDumpField("acceleration");
model.addDumpField("residual");
model.addDumpField("stress");
model.addDumpField("grad_u");
model.addDumpField("partitions");
// model.getDumper().getDumper().setMode(iohelper::BASE64);
model.dump();
model.setBaseNameToDumper("cohesive elements",
"extrinsic_parallel_cohesive_elements");
model.addDumpFieldVectorToDumper("cohesive elements", "displacement");
model.addDumpFieldToDumper("cohesive elements", "damage");
model.dump("cohesive elements");
/// Main loop
for (UInt s = 1; s <= max_steps; ++s) {
/// update displacement on extreme nodes
for (UInt n = 0; n < nb_nodes; ++n) {
if (position(n, 1) > 0.99 || position(n, 1) < -0.99)
displacement(n, 1) += disp_update * position(n, 1);
}
model.checkCohesiveStress();
model.solveStep();
// model.dump();
if (s % 10 == 0) {
if (prank == 0)
std::cout << "passing step " << s << "/" << max_steps << std::endl;
}
// // update displacement
// for (UInt n = 0; n < nb_nodes; ++n) {
// if (position(n, 1) + displacement(n, 1) > 0) {
// displacement(n, 0) -= 0.01;
// }
// }
// Real Ed = dynamic_cast<MaterialCohesive&>
// (model.getMaterial(1)).getDissipatedEnergy();
// Real Er = dynamic_cast<MaterialCohesive&>
// (model.getMaterial(1)).getReversibleEnergy();
// edis << s << " "
// << Ed << std::endl;
// erev << s << " "
// << Er << std::endl;
}
model.dump();
model.dump("cohesive elements");
// edis.close();
// erev.close();
Real Ed = model.getEnergy("dissipated");
Real Edt = 200 * sqrt(2);
if (prank == 0) {
std::cout << Ed << " " << Edt << std::endl;
if (Ed < Edt * 0.999 || Ed > Edt * 1.001 || std::isnan(Ed)) {
std::cout << "The dissipated energy is incorrect" << std::endl;
finalize();
return EXIT_FAILURE;
}
}
finalize();
return EXIT_SUCCESS;
}

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