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RROMPy/tests/hfengines/linear_elasticity.py
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linear_elasticity.py
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# Copyright (C) 2018 by the RROMPy authors
#
# This file is part of RROMPy.
#
# RROMPy 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.
#
# RROMPy 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 RROMPy. If not, see <http://www.gnu.org/licenses/>.
#
import numpy as np
from rrompy.hfengines.vector_linear_problem import (
LinearElasticityBeamPoissonRatio)
from rod_3d import rod3Dsolver
def test_elastic_beam():
solver = LinearElasticityBeamPoissonRatio(n = 10, rho_ = 1e3, g = 3,
E = 1e6, nu0 = .45, length = 5, verbosity = 0)
mu = .45
uh = solver.solve(mu)[0]
assert np.isclose(solver.norm(uh), 9.33957e-08, rtol = 1e-1)
assert np.isclose(solver.norm(solver.residual(mu, uh)[0], dual = True),
8.4545952e-13, rtol = 1e-1)
assert np.isclose(solver.norm(solver.residual(mu, uh)[0], dual = True),
solver.norm(solver.residual(mu, uh, duality = False)[0],
dual = True, duality = False), rtol = 1e-1)
def test_elastic_rod():
solver = rod3Dsolver()
uh = solver.solve()[0]
assert np.isclose(solver.norm(uh), 0.15563476339534466, rtol = 1e-5)
assert np.isclose(solver.norm(solver.residual([], uh)[0], dual = True),
1.2210129e-07, rtol = 1e-1)
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