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test_material_cohesive_fixture.hh
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test_material_cohesive_fixture.hh
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/**
* @file test_material_cohesive_fixture.hh
*
* @author Nicolas Richart
*
* @date creation Tue Feb 20 2018
*
* @brief Test the traction separations laws for cohesive elements
*
* @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 "solid_mechanics_model_cohesive.hh"
/* -------------------------------------------------------------------------- */
#include "test_gtest_utils.hh"
/* -------------------------------------------------------------------------- */
#include <gtest/gtest.h>
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
template <template <UInt> class Mat, typename dim_>
class TestMaterialCohesiveFixture : public ::testing::Test {
public:
static constexpr UInt dim = dim_::value;
using Material = Mat<dim>;
void SetUp() override {
mesh = std::make_unique<Mesh>(dim);
model = std::make_unique<SolidMechanicsModelCohesive>(*mesh);
material = std::make_unique<Material>(*model);
material->SetUps();
openings = std::make_unique<Array<Real>>(0, dim);
tractions = std::make_unique<Array<Real>>(0, dim);
}
void TearDown() override {
material.reset(nullptr);
model.reset(nullptr);
mesh.reset(nullptr);
openings.reset(nullptr);
tractions.reset(nullptr);
}
void reset() {
openings->resize(0);
tractions->resize(0);
}
void addOpening(const Vector<Real> & direction, Real start, Real stop,
UInt nb_steps) {
for (auto s : arange(nb_steps)) {
auto opening = direction * Real(s) *(stop - start) / Real(nb_steps);
openings->push_back(opening);
}
tractions->resize(openings->size());
}
Vector<Real> randomNormal() {
std::random_device rd;
std::mt19937 gen(rd()); // Standard mersenne_twister_engine seeded with rd()
std::uniform_real_distribution<> dis;
Vector<Real> normal(dim);
for (auto s : arange(dim))
normal(s) = dis(gen);
normal.normalize();
return normal;
}
Vector<Real> applyModIOpening(Real max_opening, UInt nb_steps) {
auto normal = randomNormal();
this->material->insertion_stress_ = this->material->sigma_c_ * normal;
addOpening(normal, 0., max_opening, nb_steps);
this->material->computeTractions(*openings, normal, *tractions);
return normal;
}
protected:
std::unique_ptr<Mesh> mesh;
std::unique_ptr<SolidMechanicsModelCohesive> model;
std::unique_ptr<Material> material;
std::unique_ptr<Array<Real>> openings;
std::unique_ptr<Array<Real>> tractions;
};
template <template <UInt> class Mat, UInt dim>
struct TestMaterialCohesive : public Mat<dim> {
TestMaterialCohesive(SolidMechanicsModel & model) : Mat<dim>(model, "test") {
}
virtual void SetUp() {}
virtual void resetInternal() {}
void SetUps() {
this->initMaterial();
this->updateInternalParameters();
this->SetUp();
this->resetInternals();
}
void resetInternals() {
this->resetInternal();
}
virtual void computeTractions(const Array<Real> & /*openings*/,
const Vector<Real> & /*normal*/,
Array<Real> & /*tractions*/) {}
Vector<Real> insertion_stress_;
Real sigma_c_{0};
bool is_extrinsic{true};
};
template <template <UInt> class Mat, typename dim_>
constexpr UInt TestMaterialCohesiveFixture<Mat, dim_>::dim;

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