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test_structural_mechanics_model_bernoulli_beam_3.cc
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Sun, Aug 25, 16:19
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rAKA akantu
test_structural_mechanics_model_bernoulli_beam_3.cc
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/**
* @file test_structural_mechanics_model_bernoulli_beam_3.cc
*
* @author Lucas Frerot <lucas.frerot@epfl.ch>
*
* @date creation: Fri Jul 15 2011
* @date last modification: Fri Feb 09 2018
*
* @brief Computation of the analytical exemple 1.1 in the TGC vol 6
*
* @section LICENSE
*
* Copyright (©) 2010-2018 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "test_structural_mechanics_model_fixture.hh"
/* -------------------------------------------------------------------------- */
#include <gtest/gtest.h>
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
class
TestStructBernoulli3
:
public
TestStructuralFixture
<
element_type_t
<
_bernoulli_beam_3
>>
{
using
parent
=
TestStructuralFixture
<
element_type_t
<
_bernoulli_beam_3
>>
;
public
:
void
readMesh
(
std
::
string
filename
)
override
{
parent
::
readMesh
(
filename
);
auto
&
normals
=
this
->
mesh
->
getElementalData
<
Real
>
(
"extra_normal"
)
.
alloc
(
0
,
parent
::
spatial_dimension
,
parent
::
type
,
_not_ghost
);
Vector
<
Real
>
normal
=
{
0
,
0
,
1
};
normals
.
push_back
(
normal
);
normal
=
{
0
,
0
,
1
};
normals
.
push_back
(
normal
);
}
void
addMaterials
()
override
{
StructuralMaterial
mat
;
mat
.
E
=
1
;
mat
.
Iz
=
1
;
mat
.
Iy
=
1
;
mat
.
A
=
1
;
mat
.
GJ
=
1
;
this
->
model
->
addMaterial
(
mat
);
}
void
setDirichlets
()
{
// Boundary conditions (blocking all DOFs of nodes 2 & 3)
auto
boundary
=
++
this
->
model
->
getBlockedDOFs
().
begin
(
parent
::
ndof
);
// clang-format off
*
boundary
=
{
true
,
true
,
true
,
true
,
true
,
true
};
++
boundary
;
*
boundary
=
{
true
,
true
,
true
,
true
,
true
,
true
};
++
boundary
;
// clang-format on
}
void
setNeumanns
()
override
{
// Forces
Real
P
=
1
;
// N
auto
&
forces
=
this
->
model
->
getExternalForce
();
forces
.
clear
();
forces
(
0
,
2
)
=
-
P
;
// vertical force on first node
}
void
assignMaterials
()
override
{
model
->
getElementMaterial
(
parent
::
type
).
set
(
0
);
}
};
/* -------------------------------------------------------------------------- */
TEST_F
(
TestStructBernoulli3
,
TestDisplacements
)
{
model
->
solveStep
();
auto
vz
=
model
->
getDisplacement
()(
0
,
2
);
auto
thy
=
model
->
getDisplacement
()(
0
,
4
);
auto
thx
=
model
->
getDisplacement
()(
0
,
3
);
auto
thz
=
model
->
getDisplacement
()(
0
,
5
);
Real
tol
=
Math
::
getTolerance
();
EXPECT_NEAR
(
vz
,
-
5.
/
48
,
tol
);
EXPECT_NEAR
(
thy
,
-
std
::
sqrt
(
2
)
/
8
,
tol
);
EXPECT_NEAR
(
thz
,
0
,
tol
);
EXPECT_NEAR
(
thx
,
0
,
tol
);
}
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