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test_material_iterative_stiffness_reduction.cc
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Wed, May 22, 14:47

test_material_iterative_stiffness_reduction.cc
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/**
* @file test_material_iterative_strength_reduction.cc
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @date Thu Nov 26 12:20:15 2015
*
* @brief test the material iterative stiffness reduction
*
*
* 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 "communicator.hh"
#include "material_damage_iterative.hh"
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
/* Main */
/* -------------------------------------------------------------------------- */
int main(int argc, char * argv[]) {
Math::setTolerance(1e-13);
debug::setDebugLevel(dblWarning);
initialize("material_stiffness_reduction.dat", argc, argv);
const Int spatial_dimension = 2;
ElementType element_type = _triangle_3;
const auto & comm = Communicator::getStaticCommunicator();
Int prank = comm.whoAmI();
/// read the mesh and partion it
Mesh mesh(spatial_dimension);
if (prank == 0) {
mesh.read("two_elements.msh");
}
mesh.distribute();
/// model creation
SolidMechanicsModel model(mesh);
/// initialization of the model
model.initFull(SolidMechanicsModelOptions(_static));
/// boundary conditions
/// Dirichlet BC
mesh.createGroupsFromMeshData<std::string>(
"physical_names"); // creates groups from mesh names
model.applyBC(BC::Dirichlet::FixedValue(0, _x), "left");
model.applyBC(BC::Dirichlet::FixedValue(0, _y), "bottom");
model.applyBC(BC::Dirichlet::FixedValue(2., _y), "top");
/// add fields that should be dumped
model.setBaseName("material_iterative_stiffness_reduction_test");
model.addDumpField("material_index");
model.addDumpFieldVector("displacement");
;
model.addDumpField("stress");
model.addDumpField("blocked_dofs");
model.addDumpField("residual");
model.addDumpField("grad_u");
model.addDumpField("damage");
model.addDumpField("partitions");
model.addDumpField("Sc");
model.addDumpField("force");
model.addDumpField("equivalent_stress");
model.addDumpField("ultimate_strain");
model.dump();
MaterialDamageIterative<spatial_dimension> & material =
dynamic_cast<MaterialDamageIterative<spatial_dimension> &>(
model.getMaterial(0));
UInt nb_damaged_elements = 0;
Real E = material.get("E");
std::cout << std::setprecision(12);
const Array<Real> & damage =
material.getInternal<Real>("damage")(element_type, _not_ghost);
const Array<Real> & Sc =
material.getInternal<Real>("Sc")(element_type, _not_ghost);
/// solve the system
do {
model.solveStep();
nb_damaged_elements = material.updateDamage();
for (Int e = 0; e < mesh.getNbElement(element_type, _not_ghost); ++e) {
std::cout << "the new modulus is " << (1 - damage(0)) * E << std::endl;
std::cout << "the new strength is " << Sc(0) << std::endl;
}
model.dump();
} while (nb_damaged_elements);
finalize();
return EXIT_SUCCESS;
}

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