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test_material_fixtures.hh
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test_material_fixtures.hh
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/**
* @file test_material_fixtures.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Nov 17 2017
* @date last modification: Fri Dec 13 2019
*
* @brief Fixture for material tests
*
*
* @section LICENSE
*
* Copyright (©) 2016-2021 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 "test_gtest_utils.hh"
/* -------------------------------------------------------------------------- */
#include <material_elastic.hh>
#include <solid_mechanics_model.hh>
/* -------------------------------------------------------------------------- */
#include <gtest/gtest.h>
#include <random>
#include <type_traits>
/* -------------------------------------------------------------------------- */
using namespace akantu;
/* -------------------------------------------------------------------------- */
template <typename T> class FriendMaterial : public T {
public:
~FriendMaterial() = default;
FriendMaterial(SolidMechanicsModel & model, const ID & id = "material")
: T(model, id) {
gen.seed(::testing::GTEST_FLAG(random_seed));
}
virtual void testComputeStress() { AKANTU_TO_IMPLEMENT(); };
virtual void testComputeTangentModuli() { AKANTU_TO_IMPLEMENT(); };
virtual void testEnergyDensity() { AKANTU_TO_IMPLEMENT(); };
virtual void testCelerity() { AKANTU_TO_IMPLEMENT(); }
virtual void setParams() {}
virtual void SetUp() {
this->setParams();
this->initMaterial();
}
virtual void TearDown() {}
inline Matrix<Real> getDeviatoricStrain(Real intensity);
inline Matrix<Real> getHydrostaticStrain(Real intensity);
inline Matrix<Real> getComposedStrain(Real intensity);
inline const Matrix<Real> reverseRotation(Matrix<Real> mat,
Matrix<Real> rotation_matrix) {
Matrix<Real> R = rotation_matrix;
Matrix<Real> m2 = mat * R;
Matrix<Real> m1 = R.transpose();
return m1 * m2;
};
inline const Matrix<Real> applyRotation(Matrix<Real> mat,
const Matrix<Real> rotation_matrix) {
Matrix<Real> R = rotation_matrix;
Matrix<Real> m2 = mat * R.transpose();
Matrix<Real> m1 = R;
return m1 * m2;
};
inline Vector<Real> getRandomVector();
inline Matrix<Real> getRandomRotation();
protected:
std::mt19937 gen;
};
/* -------------------------------------------------------------------------- */
template <typename T>
Matrix<Real> FriendMaterial<T>::getDeviatoricStrain(Real intensity) {
Matrix<Real> dev = {{0., 1., 2.}, {1., 0., 3.}, {2., 3., 0.}};
dev *= intensity;
return dev;
}
/* -------------------------------------------------------------------------- */
template <typename T>
Matrix<Real> FriendMaterial<T>::getHydrostaticStrain(Real intensity) {
Matrix<Real> dev = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}};
dev *= intensity;
return dev;
}
/* -------------------------------------------------------------------------- */
template <typename T>
Matrix<Real> FriendMaterial<T>::getComposedStrain(Real intensity) {
Matrix<Real> s = FriendMaterial<T>::getHydrostaticStrain(intensity) +
FriendMaterial<T>::getDeviatoricStrain(intensity);
s *= intensity;
return s;
}
/* -------------------------------------------------------------------------- */
template <typename T> Vector<Real> FriendMaterial<T>::getRandomVector() {
auto dim = this->spatial_dimension;
std::uniform_real_distribution<Real> dis;
Vector<Real> vector(dim, 0.);
while (vector.norm() < 1e-9) {
for (auto s : arange(dim))
vector(s) = dis(gen);
}
return vector;
}
/* -------------------------------------------------------------------------- */
template <typename T> Matrix<Real> FriendMaterial<T>::getRandomRotation() {
auto dim = this->spatial_dimension;
Matrix<Real> rotation(dim, dim);
Vector<Real> v1 = rotation(0);
v1 = getRandomVector().normalize();
if (dim == 2) {
Vector<Real> v1_ = {v1(0), v1(1), 0};
Vector<Real> v2_(3);
Vector<Real> v3_ = {0, 0, 1};
v2_.crossProduct(v3_, v1_);
Vector<Real> v2 = rotation(1);
v2(0) = v2_(0);
v2(1) = v2_(1);
}
if (dim == 3) {
auto v2 = getRandomVector();
v2 = (v2 - v2.dot(v1) * v1).normalize();
Vector<Real> v3(3);
v3.crossProduct(v1, v2);
rotation(1) = v2;
rotation(2) = v3;
}
//#define debug_
#if defined(debug_)
if (dim == 2)
rotation = Matrix<Real>{{1., 0.}, {0., 1.}};
if (dim == 3)
rotation = Matrix<Real>{{1., 0., 0.}, {0., 1., 0.}, {0., 0., 1.}};
#endif
rotation = rotation.transpose();
return rotation;
}
/* -------------------------------------------------------------------------- */
template <typename T, class Model>
class TestMaterialBaseFixture : public ::testing::Test {
public:
using mat_class = typename T::mat_class;
void SetUp() override {
constexpr auto spatial_dimension = T::Dim;
mesh = std::make_unique<Mesh>(spatial_dimension);
model = std::make_unique<Model>(*mesh);
material = std::make_unique<friend_class>(*model);
material->SetUp();
}
void TearDown() override {
material->TearDown();
material.reset(nullptr);
model.reset(nullptr);
mesh.reset(nullptr);
}
using friend_class = FriendMaterial<mat_class>;
protected:
std::unique_ptr<Mesh> mesh;
std::unique_ptr<Model> model;
std::unique_ptr<friend_class> material;
};
/* -------------------------------------------------------------------------- */
template <template <UInt> class T, UInt _Dim> struct Traits {
using mat_class = T<_Dim>;
static constexpr UInt Dim = _Dim;
};
/* -------------------------------------------------------------------------- */
template <typename T>
using TestMaterialFixture = TestMaterialBaseFixture<T, SolidMechanicsModel>;
/* -------------------------------------------------------------------------- */

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