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rAKA/examples/contact_mechanics/solid_explicit_dynamic.cc
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solid_explicit_dynamic.cc
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/**
* @file test_contact_mechanics_model.cc
*
* @author Mohit Pundir <mohit.pundir@epfl.ch>
*
* @date creation: Tue Apr 30 2019
* @date last modification: Tue Apr 30 2019
*
* @brief 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"
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[]) {
const UInt spatial_dimension = 2;
initialize("material.dat", argc, argv);
Real time_step;
Real time_factor = 0.8;
UInt max_steps = 5000;
Mesh mesh(spatial_dimension);
mesh.read("contact_hertz_2d.msh");
SolidMechanicsModel solid(mesh);
auto && selector = std::make_shared<MeshDataMaterialSelector<std::string>>(
"physical_names", solid);
solid.setMaterialSelector(selector);
solid.initFull( _analysis_method = _explicit_lumped_mass);
time_step = solid.getStableTimeStep();
std::cout << "Time Step = " << time_step * time_factor << "s (" << time_step
<< "s)" << std::endl;
solid.setTimeStep(time_step * time_factor);
solid.applyBC(BC::Dirichlet::FixedValue(0.0, _x), "bottom");
solid.applyBC(BC::Dirichlet::FixedValue(0.0, _y), "bottom");
solid.applyBC(BC::Dirichlet::FixedValue(0.0, _x), "top");
solid.setBaseName("solid-explicit-dynamic");
solid.addDumpFieldVector("displacement");
solid.addDumpFieldVector("velocity");
solid.addDumpFieldVector("external_force");
solid.addDumpFieldVector("internal_force");
solid.addDumpField("blocked_dofs");
solid.addDumpField("grad_u");
solid.addDumpField("stress");
auto & velocity = solid.getVelocity();
Real damping_ratio = 0.7;
for (auto i : arange(max_steps)) {
auto increment = time_step * 5e-4;
solid.applyBC(BC::Dirichlet::IncrementValue(-increment, _y), "top");
solid.solveStep();
Real epot = solid.getEnergy("potential");
Real ekin = solid.getEnergy("kinetic");
std::cerr << i << "," << i * increment << "," << epot << "," << ekin << ","
<< epot + ekin << "," << std::endl;
for (auto & v : make_view(velocity)) {
v *= damping_ratio;
}
solid.dump();
}
finalize();
return EXIT_SUCCESS;
}
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