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tamaas/examples/rough_contact.py
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rough_contact.py
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#!/usr/bin/env python3
# @file
# @section LICENSE
#
# Copyright (©) 2016-2020 EPFL (École Polytechnique Fédérale de Lausanne),
# Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
#
# 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 tamaas as tm
import matplotlib.pyplot as plt
# Initialize threads and fftw
tm.set_log_level(tm.LogLevel.info) # Show progression of solver
# Surface size
n = 512
# Surface generator
sg = tm.SurfaceGeneratorFilter2D()
sg.setSizes([n, n])
sg.random_seed = 0
# Spectrum
spectrum = tm.Isopowerlaw2D()
sg.setFilter(spectrum)
# Parameters
spectrum.q0 = 16
spectrum.q1 = 16
spectrum.q2 = 64
spectrum.hurst = 0.8
# Generating surface
surface = sg.buildSurface()
# surface /= tm.SurfaceStatistics.computeSpectralRMSSlope(surface)
surface /= n
# print(spectrum.rmsSlopes())
# print(tm.SurfaceStatistics.computeRMSSlope(surface))
plt.imshow(surface)
# Creating model
model = tm.ModelFactory.createModel(tm.model_type_basic_2d, [1., 1.], [n, n])
# Solver
solver = tm.PolonskyKeerRey(model, surface, 1e-12,
tm.PolonskyKeerRey.pressure,
tm.PolonskyKeerRey.pressure)
# Solve for target pressure
p_target = 0.1
solver.solve(p_target)
plt.figure()
plt.imshow(model.getTraction())
plt.title('Contact tractions')
print(model.getTraction().mean())
plt.show()
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