test_lumped_mass.cc
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Created: Thu, Dec 12, 03:33

test_lumped_mass.cc
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	/**
	* Copyright (©) 2017-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
	* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
	*
	* This file is part of Akantu
	*
	* 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.hh"
	#include "test_gtest_utils.hh"
	/* -------------------------------------------------------------------------- */
	#include <gtest/gtest.h>
	#include <tuple>
	/* -------------------------------------------------------------------------- */

	using namespace akantu;

	template <typename tuple_>
	class TestLumpedMassesFixture : public ::testing::Test {
	public:
	static constexpr ElementType type = tuple_::value;
	static constexpr size_t dim = ElementClass<type>::getSpatialDimension();

	void SetUp() override {
	debug::setDebugLevel(dblError);
	getStaticParser().parse("material_lumped.dat");

	std::stringstream element_type;
	element_type << type;

	mesh = std::make_unique<Mesh>(dim);
	mesh->read(element_type.str() + ".msh");

	SCOPED_TRACE(element_type.str().c_str());

	model = std::make_unique<SolidMechanicsModel>(*mesh);

	model->initFull(_analysis_method = _explicit_lumped_mass);
	}

	void TearDown() override {
	model.reset(nullptr);
	mesh.reset(nullptr);
	}

	protected:
	std::unique_ptr<Mesh> mesh;
	std::unique_ptr<SolidMechanicsModel> model;
	};

	template <typename T> constexpr ElementType TestLumpedMassesFixture<T>::type;
	template <typename T> constexpr size_t TestLumpedMassesFixture<T>::dim;

	using mass_types = gtest_list_t<TestElementTypes>;

	TYPED_TEST_SUITE(TestLumpedMassesFixture, mass_types, );

	TYPED_TEST(TestLumpedMassesFixture, TestLumpedMass) {
	this->model->assembleMassLumped();

	auto rho = this->model->getMaterial(0).getRho();
	auto & fem = this->model->getFEEngine();
	auto nb_element = this->mesh->getNbElement(this->type);
	auto nb_quadrature_points =
	fem.getNbIntegrationPoints(this->type) * nb_element;

	Array<Real> rho_on_quad(nb_quadrature_points, 1, rho, "rho_on_quad");
	auto mass = fem.integrate(rho_on_quad, this->type);
	const auto & masses = this->model->getMass();

	Vector<Real> sum(this->dim);
	sum.zero();
	for (auto & mass : make_view(masses, this->dim)) {
	sum += mass;
	}

	for (Int s = 0; s < sum.size(); ++s)
	EXPECT_NEAR(0., (mass - sum[s]) / mass, 2e-15);
	}

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