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blocks.cc
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/**
* @file blocks.cc
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date Tue Jan 14 09:38:00 2014
*
* @brief Example of two blocks in contact
*
* @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 <iostream>
#include <chrono>
#include "contact_impl.hh"
using namespace akantu;
using std::cout;
using std::endl;
int main(int argc, char *argv[]) {
// set dimension
static const UInt dim = 2;
typedef std::chrono::high_resolution_clock clock;
typedef std::chrono::seconds seconds;
typedef SolidMechanicsModel model_type;
typedef Contact <dim, MasterAssignator, SelectResolution <_static, _augmented_lagrangian> >
contact_type;
// capture initial time
clock::time_point t0 = clock::now();
initialize("steel.dat", argc, argv);
// create and read mesh
Mesh mesh(dim);
mesh.read("blocks.msh");
// create model
model_type model(mesh);
SolidMechanicsModelOptions opt(_static);
// initialize material
model.initFull(opt);
// setup paraview dumper
model.setBaseName("contact");
model.addDumpFieldVector("displacement");
// create data structure that holds contact data
contact_type cd(argc, argv, model);
// get areas for slave nodes
mesh.createGroupsFromMeshData<std::string>("physical_names");
model.applyBC(BC::Neumann::FromHigherDim(Matrix<Real>::eye(2,1.)), "interface_top");
Array<Real>& areas = model.getForce();
ElementGroup &eg = mesh.getElementGroup("interface_top");
for (auto nit = eg.node_begin(); nit != eg.node_end(); ++nit) {
// add slave node
cd.addSlave(*nit);
// compute and add area
Real a = 0.;
for (UInt i=0; i<dim; ++i)
a += pow(areas(*nit, i),2.);
cd.addArea(*nit, sqrt(a));
}
// set force value to zero
areas.clear();
// add master surface to find pairs
cd.searchSurface("interface_bottom");
// apply boundary conditions
using BC::Dirichlet::FixedValue;
model.applyBC(FixedValue(0., _x), "bottom");
model.applyBC(FixedValue(0., _y), "bottom");
model.applyBC(FixedValue(0., _x), "top");
Real U = 0.5;
Real Du = 0.005;
// loop over command line parameters
for (int i=0; i<argc; ++i) {
if (strcmp(argv[i], "-steps") == 0) {
Real steps = atof(argv[++i]);
cout<<"-steps = "<<steps<<endl;
Du = U / steps;
}
}
// loop over load increments
for (Real u = Du; u<=U; u += Du) {
model.applyBC(FixedValue(-u, _y), "top");
solveContactStep<_generalized_newton>(cd);
}
clock::time_point t1 = clock::now();
seconds total_s = std::chrono::duration_cast<seconds>(t1 - t0);
cout<<"- Simulation took "<<total_s.count()<<" s"<<endl;
// finalize simulation
finalize();
return EXIT_SUCCESS;
}

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