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test_hertz_2d.cc
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Wed, Sep 11, 07:48

test_hertz_2d.cc
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/**
* @file test_hertz_2d.cc
*
* @author Mohit Pundir <mohit.pundir@epfl.ch>
*
* @date creation: Tue Apr 30 2019
* @date last modification: Tue Apr 30 2019
*
* @brief Hertz Test for contact mechanics model class
*
* @section LICENSE
*
* Copyright (©) 2010-2018 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 "solid_mechanics_model.hh"
#include "contact_mechanics_model.hh"
#include "coupler_solid_contact.hh"
#include "non_linear_solver.hh"
#include "dumper_text.hh"
#include "dumper_variable.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[]) {
UInt max_steps = 5000;
UInt imposing_steps = 1000;
UInt damping_interval = 10;
Real damping_ratio = 0.9;
Real pressure = 0.01;
std::string mesh_file = "hertz_2d.msh";
std::string material_file = "material_hertz.dat";
const UInt spatial_dimension = 2;
initialize(material_file, argc, argv);
Mesh mesh(spatial_dimension);
mesh.read(mesh_file);
CouplerSolidContact coupler(mesh);
auto & solid = coupler.getSolidMechanicsModel();
auto & contact = coupler.getContactMechanicsModel();
auto && selector = std::make_shared<MeshDataMaterialSelector<std::string>>(
"physical_names",solid);
solid.initFull( _analysis_method = _explicit_lumped_mass);
contact.initFull(_analysis_method = _explicit_dynamic_contact);
solid.applyBC(BC::Dirichlet::FixedValue(0.0, _x), "top_body");
solid.applyBC(BC::Dirichlet::FixedValue(0.0, _y), "top_body");
coupler.initFull(_analysis_method = _explicit_dynamic_contact);
Vector<Real> weight = {0, pressure};
solid.applyBC(BC::Neumann::FromSameDim(weight), "bottom");
Real time_step = solid.getStableTimeStep();
time_step *= 0.8;
coupler.setTimeStep(time_step);
coupler.setBaseName("test-hertz-2d");
coupler.addDumpFieldVector("displacement");
coupler.addDumpFieldVector("normals");
coupler.addDumpFieldVector("contact_force");
coupler.addDumpFieldVector("external_force");
coupler.addDumpFieldVector("internal_force");
coupler.addDumpField("gaps");
coupler.addDumpField("areas");
coupler.addDumpField("blocked_dofs");
coupler.addDumpField("grad_u");
coupler.addDumpField("stress");
auto & velocity = solid.getVelocity();
auto & gaps = contact.getGaps();
auto & areas = contact.getNodalArea();
for (UInt s : arange(max_steps)) {
std::cerr << "Step " << s << std::endl;
coupler.solveStep();
if (s % damping_interval == 0) {
for (auto & v : make_view(velocity))
v *= damping_ratio;
}
if (s % 100 == 0) {
coupler.dump();
}
}
finalize();
return EXIT_SUCCESS;
}

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