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test_restart.py
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Sat, May 25, 03:19

test_restart.py
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# -*- coding: utf-8 -*-
#
# Copyright (©) 2016-20 EPFL (École Polytechnique Fédérale de Lausanne),
# Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
# Copyright (©) 2020-2023 Lucas Frérot
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import pytest
import tamaas as tm
from numpy.testing import assert_allclose
from tamaas.dumpers import NumpyDumper
from tamaas.nonlinear_solvers import DFSANECXXSolver as CXXSolver
def test_restart_plasticity(patch_isotropic_plasticity, tmp_path):
model = patch_isotropic_plasticity.model
residual = patch_isotropic_plasticity.residual
applied_pressure = 0.1
solver = CXXSolver(residual)
solver.tolerance = 1e-15
pressure = model['traction'][..., 2]
pressure[:] = applied_pressure
solver.solve()
solver.updateState()
path = tmp_path / 'restart'
NumpyDumper(path, all_fields=True, mkdir=False) << model
new_model = NumpyDumper.read(
path.with_stem("restart_0000").with_suffix('.npz')
)
mat = tm.materials.IsotropicHardening(model, sigma_y=1e-2, hardening=0.1)
new_res = tm.Residual(model, mat)
new_solver = CXXSolver(residual)
for key in new_model:
print(key)
assert_allclose((model[key] - new_model[key]), 0, atol=3e-15)

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