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test_boundary_condition_functors.py
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rAKA akantu
test_boundary_condition_functors.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# ===============================================================================
# @file test_boundary_condition_functors.py
#
# @author Lucas Frérot <lucas.frerot@epfl.ch>
#
# @date creation: Thu Feb 11 2016
#
# @brief Testing the apply*BC functions in python interface
#
# @section LICENSE
#
# Copyright (©) 2016 EPFL (Ecole Polytechnique Fédérale de Lausanne)
# Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
#
# 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/>.
#
# ===============================================================================
from
__future__
import
print_function
import
sys
import
os
import
numpy
as
np
import
akantu
as
aka
######################################################################
# Boundary conditions founctors
######################################################################
class
FixedValue
:
"""Functor for Dirichlet boundary conditions"""
def
__init__
(
self
,
value
,
axis
):
self
.
value
=
value
axis_dict
=
{
'x'
:
0
,
'y'
:
1
,
'z'
:
2
}
self
.
axis
=
axis_dict
[
axis
]
def
operator
(
self
,
node
,
flags
,
primal
,
coord
):
primal
[
self
.
axis
]
=
self
.
value
flags
[
self
.
axis
]
=
True
#---------------------------------------------------------------------
class
FromStress
:
"""Functor for Neumann boundary conditions"""
def
__init__
(
self
,
stress
):
self
.
stress
=
stress
def
operator
(
self
,
quad_point
,
dual
,
coord
,
normals
):
dual
[:]
=
np
.
dot
(
self
.
stress
,
normals
)
######################################################################
def
main
():
aka
.
initialize
(
"input_test.dat"
)
mesh
=
aka
.
Mesh
(
2
)
mesh
.
read
(
'mesh_dcb_2d.msh'
)
mesh
.
createGroupsFromStringMeshData
(
"physical_names"
)
model
=
aka
.
SolidMechanicsModel
(
mesh
,
2
)
model
.
initFull
()
model
.
applyDirichletBC
(
FixedValue
(
0.0
,
'x'
),
"edge"
)
stress
=
np
.
array
([[
1
,
0
],
[
0
,
0
]])
blocked_nodes
=
mesh
.
getElementGroup
(
"edge"
)
.
getNodes
()
.
flatten
()
boundary
=
model
.
getBlockedDOFs
()
# Testing that nodes are correctly blocked
for
n
in
blocked_nodes
:
if
not
boundary
[
n
,
0
]:
return
-
1
boundary
.
fill
(
False
)
model
.
applyNeumannBC
(
FromStress
(
stress
),
"edge"
)
force
=
model
.
getForce
()
# Checking that nodes have a force in the correct direction
for
n
in
blocked_nodes
:
if
not
force
[
n
,
0
]
>
0
:
return
-
1
aka
.
finalize
()
return
0
if
__name__
==
"__main__"
:
sys
.
exit
(
main
())
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