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test_material_elasto_plastic_linear_isotropic_hardening.cc
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test_material_elasto_plastic_linear_isotropic_hardening.cc
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/**
* @file test_material_elasto_plastic_linear_isotropic_hardening.cc
*
# @author Jaehyun Cho <jaehyun.cho@epfl.ch>
*
# @date creation: Fri Aug 3 2015
*
# @brief test for material type elasto plastic linear isotropic hardening using
# tension-compression test
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 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 <iostream>
using namespace akantu;
// /* -------------------------------------------------------------------------- */
const UInt spatial_dimension = 2;
const Real time_step = 1e-4;
const Real max_time = 0.15;
/* -------------------------------------------------------------------------- */
int main(int argc, char *argv[]) {
initialize("test_material_elasto_plastic_linear_isotropic_hardening.dat", argc, argv);
Mesh mesh(spatial_dimension);
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
Int psize = comm.getNbProc();
Int prank = comm.whoAmI();
MeshPartition * partition = NULL;
if(prank == 0) {
mesh.read("test_material_elasto_plastic_linear_isotropic_hardening.msh");
partition = new MeshPartitionScotch(mesh, spatial_dimension);
partition->partitionate(psize);
}
SolidMechanicsModel model(mesh);
model.initParallel(partition);
mesh.createGroupsFromMeshData<std::string>("physical_names");
/// model initialization
model.initFull(SolidMechanicsModelOptions(_implicit_dynamic));
Material &mat = model.getMaterial(0);
Real E = mat.getParam<Real>("E");
Real rho = mat.getParam<Real>("rho");
Real h = mat.getParam<Real>("h");
Real sigma_y = mat.getParam<Real>("sigma_y");
mat.setParam("E", E);
mat.setParam("rho", rho);
mat.setParam("h", h);
mat.setParam("sigma_y", sigma_y);
model.applyBC(BC::Dirichlet::FixedValue(0.0, _x), "left");
model.applyBC(BC::Dirichlet::FixedValue(0.0, _y), "bottom");
Mesh::type_iterator it = mesh.firstType(spatial_dimension);
Mesh::type_iterator lastType = mesh.lastType(spatial_dimension);
model.setBaseName("dynamic");
model.addDumpFieldVector("displacement");
model.addDumpField("velocity" );
model.addDumpField("acceleration");
model.addDumpField("stress" );
model.addDumpField("strain" );
model.dump();
std::ofstream output2;
output2.open("strain-stress.txt");
if(!output2.good()) AKANTU_DEBUG_ERROR("Cannot open file \"strain-stress.txt\"");
output2 << "timestep, strain(0), stress(0)" << std::endl;
output2 << "0 0.0 0.0 " << std::endl;
model.setTimeStep(time_step);
double dz = 1e-4;
Real time = 0.;
ElementTypeMapArray<Real> & byel_stress = model.flattenInternal("stress", _ek_regular);
for (UInt s = 1; time < max_time; ++s, time += time_step) {
if(prank == 0)
std::cout << "Traction by " << dz*s << " \r" << std::flush;
model.solveStep<_scm_newton_raphson_tangent_modified, _scc_increment>(1e-12, 100);
model.applyBC(BC::Dirichlet::IncrementValue(dz, _x), "right");
if(s % 10 == 0){
model.dump();
Real strainxx = 0.0;
Real stressxx = 0.0;
for(it = mesh.firstType(spatial_dimension); it != lastType; ++it){
Array<Real> & stress = byel_stress(*it);
for(UInt quad = 0; quad < stress.getSize(); ++quad){
stressxx += stress(quad,0);
}
strainxx = dz*s/10.0;
stressxx = stressxx/stress.getSize();
output2 << s << " " << strainxx << " " << stressxx << std::endl;
}
}
}
output2.close();
finalize();
return EXIT_SUCCESS;
}

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