Homec4science
Diffusion µSpectre (feat/small_strain_issue_T1779) Browse

muSpectre/tests/test_material_hyper_elastic1.cc
94e2f83651aafeat/small_strain_issue…

Last Change
Raw File

test_material_hyper_elastic1.cc
View Options

/**
* file test_material_hyper_elastic1.cc
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 28 Nov 2017
*
* @brief Tests for the large-strain, objective Hooke's law, implemented in
* the convenient strategy (i.e., using MaterialMuSpectre)
*
* @section LICENCE
*
* Copyright © 2017 Till Junge
*
* µSpectre is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3, or (at
* your option) any later version.
*
* µSpectre 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <type_traits>
#include <boost/mpl/list.hpp>
#include <boost/range/combine.hpp>
#include "materials/material_hyper_elastic1.hh"
#include "tests.hh"
#include "common/test_goodies.hh"
#include "common/field_collection.hh"
#include "common/iterators.hh"
namespace muSpectre {
BOOST_AUTO_TEST_SUITE(material_hyper_elastic_1);
template <Dim_t DimS, Dim_t DimM>
struct MaterialFixture
{
using Mat_t = MaterialHyperElastic1<DimS, DimM>;
constexpr static Real lambda{2}, mu{1.5};
constexpr static Real young{mu*(3*lambda + 2*mu)/(lambda + mu)};
constexpr static Real poisson{lambda/(2*(lambda + mu))};
MaterialFixture():mat("Name", young, poisson){};
constexpr static Dim_t sdim{DimS};
constexpr static Dim_t mdim{DimM};
Mat_t mat;
};
using mat_list = boost::mpl::list<MaterialFixture<twoD, twoD>,
MaterialFixture<twoD, threeD>,
MaterialFixture<threeD, threeD>>;
BOOST_FIXTURE_TEST_CASE_TEMPLATE(test_constructor, Fix, mat_list, Fix) {
BOOST_CHECK_EQUAL("Name", Fix::mat.get_name());
auto & mat{Fix::mat};
auto sdim{Fix::sdim};
auto mdim{Fix::mdim};
BOOST_CHECK_EQUAL(sdim, mat.sdim());
BOOST_CHECK_EQUAL(mdim, mat.mdim());
}
BOOST_FIXTURE_TEST_CASE_TEMPLATE(test_add_pixel, Fix, mat_list, Fix) {
auto & mat{Fix::mat};
constexpr Dim_t sdim{Fix::sdim};
testGoodies::RandRange<size_t> rng;;
const Dim_t nb_pixel{7}, box_size{17};
using Ccoord = Ccoord_t<sdim>;
for (Dim_t i = 0; i < nb_pixel; ++i) {
Ccoord c;
for (Dim_t j = 0; j < sdim; ++j) {
c[j] = rng.randval(0, box_size);
}
BOOST_CHECK_NO_THROW(mat.add_pixel(c));
}
BOOST_CHECK_NO_THROW(mat.initialise());
}
template <Dim_t DimS, Dim_t DimM>
struct MaterialFixtureFilled: public MaterialFixture<DimS, DimM>
{
using Mat_t = typename MaterialFixture<DimS, DimM>::Mat_t;
constexpr static Dim_t box_size{3};
MaterialFixtureFilled():MaterialFixture<DimS, DimM>(){
using Ccoord = Ccoord_t<DimS>;
Ccoord cube{CcoordOps::get_cube<DimS>(box_size)};
CcoordOps::Pixels<DimS> pixels(cube);
for (auto pixel: pixels) {
this->mat.add_pixel(pixel);
}
this->mat.initialise();
};
};
using mat_fill = boost::mpl::list<MaterialFixtureFilled<twoD, twoD>,
MaterialFixtureFilled<twoD, threeD>,
MaterialFixtureFilled<threeD, threeD>>;
BOOST_FIXTURE_TEST_CASE_TEMPLATE(test_evaluate_law, Fix, mat_fill, Fix) {
constexpr auto cube{CcoordOps::get_cube<Fix::sdim>(Fix::box_size)};
auto & mat{Fix::mat};
using FC_t = FieldCollection<Fix::sdim, Fix::mdim>;
FC_t globalfields;
auto & F{make_field<typename Fix::Mat_t::StrainField_t>
("Transformation Gradient", globalfields)};
auto & P1 = make_field<typename Fix::Mat_t::StressField_t>
("Nominal Stress1", globalfields); // to be computed alone
auto & P2 = make_field<typename Fix::Mat_t::StressField_t>
("Nominal Stress2", globalfields); // to be computed with tangent
auto & K = make_field<typename Fix::Mat_t::TangentField_t>
("Tangent Moduli", globalfields); // to be computed with tangent
auto & Pr = make_field<typename Fix::Mat_t::StressField_t>
("Nominal Stress reference", globalfields);
auto & Kr = make_field<typename Fix::Mat_t::TangentField_t>
("Tangent Moduli reference", globalfields); // to be computed with tangent
globalfields.initialise(cube);
static_assert(std::is_same<decltype(P1),
typename Fix::Mat_t::StressField_t&>::value,
"oh oh");
static_assert(std::is_same<decltype(F),
typename Fix::Mat_t::StrainField_t&>::value,
"oh oh");
static_assert(std::is_same<decltype(P1), decltype(P2)&>::value,
"oh oh");
static_assert(std::is_same<decltype(K),
typename Fix::Mat_t::TangentField_t&>::value,
"oh oh");
static_assert(std::is_same<decltype(Pr), decltype(P1)&>::value,
"oh oh");
static_assert(std::is_same<decltype(Kr), decltype(K)&>::value,
"oh oh");
{ // block to contain not-constant gradient map
typename Fix::Mat_t::StressMap_t grad_map
(globalfields["Transformation Gradient"]);
for (auto F_: grad_map) {
F_.setRandom();
}
grad_map[0] = grad_map[0].Identity(); // identifiable gradients for debug
grad_map[1] = 1.2*grad_map[1].Identity(); // ditto
}
//compute stresses using material
mat.compute_stresses(globalfields["Transformation Gradient"],
globalfields["Nominal Stress1"],
Formulation::finite_strain);
//compute stresses and tangent moduli using material
BOOST_CHECK_THROW
(mat.compute_stresses_tangent(globalfields["Transformation Gradient"],
globalfields["Nominal Stress2"],
globalfields["Nominal Stress2"],
Formulation::finite_strain),
std::runtime_error);
mat.compute_stresses_tangent(globalfields["Transformation Gradient"],
globalfields["Nominal Stress2"],
globalfields["Tangent Moduli"],
Formulation::finite_strain);
typename Fix::Mat_t::StrainMap_t Fmap(globalfields["Transformation Gradient"]);
typename Fix::Mat_t::StressMap_t Pmap_ref(globalfields["Nominal Stress reference"]);
typename Fix::Mat_t::TangentMap_t Kmap_ref(globalfields["Tangent Moduli reference"]);
for (auto tup: akantu::zip(Fmap, Pmap_ref, Kmap_ref)) {
auto F_ = std::get<0>(tup);
auto P_ = std::get<1>(tup);
auto K_ = std::get<2>(tup);
std::tie(P_,K_) = testGoodies::objective_hooke_explicit<Fix::mdim>
(Fix::lambda, Fix::mu, F_);
}
typename Fix::Mat_t::StressMap_t Pmap_1(globalfields["Nominal Stress1"]);
for (auto tup: akantu::zip(Pmap_ref, Pmap_1)) {
auto P_r = std::get<0>(tup);
auto P_1 = std::get<1>(tup);
Real error = (P_r - P_1).norm();
BOOST_CHECK_LT(error, tol);
}
typename Fix::Mat_t::StressMap_t Pmap_2(globalfields["Nominal Stress2"]);
typename Fix::Mat_t::TangentMap_t Kmap(globalfields["Tangent Moduli"]);
for (auto tup: akantu::zip(Pmap_ref, Pmap_2, Kmap_ref, Kmap)) {
auto P_r = std::get<0>(tup);
auto P = std::get<1>(tup);
Real error = (P_r - P).norm();
BOOST_CHECK_LT(error, tol);
auto K_r = std::get<2>(tup);
auto K = std::get<3>(tup);
error = (K_r - K).norm();
BOOST_CHECK_LT(error, tol);
}
}
BOOST_AUTO_TEST_SUITE_END();
} // muSpectre
c4science · Help