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test_material_damage_non_local.cc
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test_material_damage_non_local.cc
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/**
* @file test_material_damage_non_local.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Clement Roux <clement.roux@epfl.ch>
*
* @date creation: Wed Aug 04 2010
* @date last modification: Thu Dec 14 2017
*
* @brief test for non-local damage materials on a 2D plate with a section gap
* the sample should break at the notch
*
*
* @section LICENSE
*
* Copyright (©) 2010-2021 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 <iostream>
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
int main(int argc, char * argv[]) {
debug::setDebugLevel(dblWarning);
akantu::initialize("material_damage_non_local.dat", argc, argv);
Int max_steps = 1100;
const Int spatial_dimension = 2;
Mesh mesh(spatial_dimension);
mesh.read("mesh_section_gap.msh");
SolidMechanicsModel model(mesh);
/// model initialization
model.initFull();
Real time_step = model.getStableTimeStep();
model.setTimeStep(time_step / 2.5);
std::cout << model << std::endl;
model.applyBC(BC::Dirichlet::FixedValue(0.0), "Fixed");
// Boundary condition (Neumann)
Matrix<Real, 2, 2> stress = Matrix<Real, 2, 2>::Identity() * 5e8;
model.applyBC(BC::Neumann::FromHigherDim(stress), "Traction");
model.setBaseName("damage_non_local");
model.addDumpFieldVector("displacement");
model.addDumpField("velocity");
model.addDumpField("acceleration");
model.addDumpFieldVector("external_force");
model.addDumpFieldVector("internal_force");
model.addDumpField("damage");
model.addDumpField("stress");
model.addDumpField("strain");
model.dump();
for (Int s = 0; s < max_steps; ++s) {
model.solveStep();
// if(s % 100 == 0) std::cout << "Step " << s+1 << "/" << max_steps
// <<std::endl; if(s % 100 == 0) model.dump();
}
model.dump();
const auto & lower_bounds = mesh.getLowerBounds();
const auto & upper_bounds = mesh.getUpperBounds();
Real L = upper_bounds(0) - lower_bounds(0);
Real H = upper_bounds(1) - lower_bounds(1);
const auto & mat = model.getMaterial(0);
const auto & filter = mat.getElementFilter();
Vector<Real> barycenter(spatial_dimension);
for (const auto & type : filter.elementTypes(spatial_dimension)) {
auto nb_elem = mesh.getNbElement(type);
const auto nb_gp = model.getFEEngine().getNbIntegrationPoints(type);
auto & material_damage_array = mat.getArray<Real>("damage", type);
Int cpt = 0;
for (Int nel = 0; nel < nb_elem; ++nel) {
mesh.getBarycenter({type, nel, _not_ghost}, barycenter);
if ((std::abs(barycenter(0) - (L / 2) + 0.025) < 0.025) &&
(std::abs(barycenter(1) - (H / 2) + 0.025) < 0.025)) {
if (material_damage_array(cpt, 0) < 0.9) {
std::terminate();
}
}
cpt += nb_gp;
}
}
return 0;
}

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