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test_cell_base.cc
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/**
* @file test_cell_base.cc
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 14 Dec 2017
*
* @brief Tests for the basic cell class
*
* 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 <boost/mpl/list.hpp>
#include <Eigen/Dense>
#include "tests.hh"
#include "common/common.hh"
#include "common/iterators.hh"
#include "common/field_map.hh"
#include "tests/test_goodies.hh"
#include "cell/cell_factory.hh"
#include "materials/material_linear_elastic1.hh"
namespace muSpectre {
BOOST_AUTO_TEST_SUITE(cell_base);
template <Dim_t DimS>
struct Sizes {
};
template<>
struct Sizes<twoD> {
constexpr static Dim_t sdim{twoD};
constexpr static Ccoord_t<sdim> get_resolution() {
return Ccoord_t<sdim>{3, 5};}
constexpr static Rcoord_t<sdim> get_lengths() {
return Rcoord_t<sdim>{3.4, 5.8};}
};
template<>
struct Sizes<threeD> {
constexpr static Dim_t sdim{threeD};
constexpr static Ccoord_t<sdim> get_resolution() {
return Ccoord_t<sdim>{3, 5, 7};}
constexpr static Rcoord_t<sdim> get_lengths() {
return Rcoord_t<sdim>{3.4, 5.8, 6.7};}
};
template <Dim_t DimS, Dim_t DimM, Formulation form>
struct CellBaseFixture: CellBase<DimS, DimM> {
constexpr static Dim_t sdim{DimS};
constexpr static Dim_t mdim{DimM};
constexpr static Formulation formulation{form};
CellBaseFixture()
:CellBase<DimS, DimM>{
std::move(cell_input<DimS, DimM>(Sizes<DimS>::get_resolution(),
Sizes<DimS>::get_lengths(),
form))} {}
};
using fixlist = boost::mpl::list<CellBaseFixture<twoD, twoD,
Formulation::finite_strain>,
CellBaseFixture<threeD, threeD,
Formulation::finite_strain>,
CellBaseFixture<twoD, twoD,
Formulation::small_strain>,
CellBaseFixture<threeD, threeD,
Formulation::small_strain>>;
BOOST_AUTO_TEST_CASE(manual_construction) {
constexpr Dim_t dim{twoD};
Ccoord_t<dim> resolutions{3, 3};
Rcoord_t<dim> lengths{2.3, 2.7};
Formulation form{Formulation::finite_strain};
auto fft_ptr{std::make_unique<FFTWEngine<dim, dim>>(resolutions, lengths)};
auto proj_ptr{std::make_unique<ProjectionFiniteStrainFast<dim, dim>>(std::move(fft_ptr))};
CellBase<dim, dim> sys{std::move(proj_ptr)};
auto sys2{make_cell<dim, dim>(resolutions, lengths, form)};
auto sys2b{std::move(sys2)};
BOOST_CHECK_EQUAL(sys2b.size(), sys.size());
}
BOOST_FIXTURE_TEST_CASE_TEMPLATE(constructor_test, fix, fixlist, fix) {
BOOST_CHECK_THROW(fix::check_material_coverage(), std::runtime_error);
BOOST_CHECK_THROW(fix::initialise(), std::runtime_error);
}
BOOST_FIXTURE_TEST_CASE_TEMPLATE(add_material_test, fix, fixlist, fix) {
constexpr Dim_t dim{fix::sdim};
using Material_t = MaterialLinearElastic1<dim, dim>;
auto Material_hard = std::make_unique<Material_t>("hard", 210e9, .33);
BOOST_CHECK_NO_THROW(fix::add_material(std::move(Material_hard)));
}
BOOST_FIXTURE_TEST_CASE_TEMPLATE(simple_evaluation_test, fix, fixlist, fix) {
constexpr Dim_t dim{fix::sdim};
constexpr Formulation form{fix::formulation};
using Mat_t = MaterialLinearElastic1<dim, dim>;
const Real Young{210e9}, Poisson{.33};
const Real lambda{Young*Poisson/((1+Poisson)*(1-2*Poisson))};
const Real mu{Young/(2*(1+Poisson))};
auto Material_hard = std::make_unique<Mat_t>("hard", Young, Poisson);
for (auto && pixel: *this) {
Material_hard->add_pixel(pixel);
}
fix::add_material(std::move(Material_hard));
auto & F = fix::get_strain();
auto F_map = F.get_map();
// finite strain formulation expects the deformation gradient F,
// while small strain expects infinitesimal strain ε
for (auto grad: F_map) {
switch (form) {
case Formulation::finite_strain: {
grad = grad.Identity();
break;
}
case Formulation::small_strain: {
grad = grad.Zero();
break;
}
default:
BOOST_CHECK(false);
break;
}
}
fix::initialise_materials();
auto res_tup{fix::evaluate_stress_tangent(F)};
auto stress{std::get<0>(res_tup).get_map()};
auto tangent{std::get<1>(res_tup).get_map()};
auto tup = testGoodies::objective_hooke_explicit
(lambda, mu, Matrices::I2<dim>());
auto P_ref = std::get<0>(tup);
for (auto mat: stress) {
Real norm = (mat - P_ref).norm();
BOOST_CHECK_EQUAL(norm, 0.);
}
auto tan_ref = std::get<1>(tup);
for (const auto tan: tangent) {
Real norm = (tan - tan_ref).norm();
BOOST_CHECK_EQUAL(norm, 0.);
}
}
BOOST_FIXTURE_TEST_CASE_TEMPLATE(evaluation_test, fix, fixlist, fix) {
constexpr Dim_t dim{fix::sdim};
using Mat_t = MaterialLinearElastic1<dim, dim>;
auto Material_hard = std::make_unique<Mat_t>("hard", 210e9, .33);
auto Material_soft = std::make_unique<Mat_t>("soft", 70e9, .3);
for (auto && cnt_pixel: akantu::enumerate(*this)) {
auto counter = std::get<0>(cnt_pixel);
auto && pixel = std::get<1>(cnt_pixel);
if (counter < 5) {
Material_hard->add_pixel(pixel);
} else {
Material_soft->add_pixel(pixel);
}
}
fix::add_material(std::move(Material_hard));
fix::add_material(std::move(Material_soft));
auto & F = fix::get_strain();
fix::initialise_materials();
fix::evaluate_stress_tangent(F);
fix::evaluate_stress_tangent(F);
}
BOOST_AUTO_TEST_SUITE_END();
} // muSpectre

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