rod_3d.py
2aa049ac9d03feature_greedy_coarseni…

rod_3d.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 fenics as fen
			from rrompy.hfengines.vector_linear_problem import (
			LinearElasticityProblemEngine)

			def rod3Dsolver():
			mesh = fen.Mesh("./tests/test_2_hfengines/rod.xml")
			rho_ = 1e3
			nu = .45
			E = 1e6
			g = 1e3
			solver = LinearElasticityProblemEngine(verbosity = 0)
			solver.V = fen.VectorFunctionSpace(mesh, "P", 1)
			solver.lambda_ = E * nu / (1. + nu) / (1. - 2 * nu)
			solver.mu_ = E / (1. + nu)
			solver.forcingTerm = [fen.Constant((0., - rho_ * g / E, 0.)),
			fen.Constant((0., 0., 0.))]
			solver.DirichletBoundary = lambda x, on_b: on_b and fen.near(x[2], 0.)
			solver.NeumannBoundary = "REST"
			return solver