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test_multi_material_elastic.cc
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Sat, Aug 3, 20:40
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rAKA akantu
test_multi_material_elastic.cc
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/**
* Copyright (©) 2017-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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 "non_linear_solver.hh"
#include <solid_mechanics_model.hh>
using
namespace
akantu
;
int
main
(
int
argc
,
char
*
argv
[])
{
initialize
(
"test_multi_material_elastic.dat"
,
argc
,
argv
);
const
Int
dim
=
2
;
Mesh
mesh
(
dim
);
mesh
.
read
(
"test_multi_material_elastic.msh"
);
SolidMechanicsModel
model
(
mesh
);
auto
&&
mat_sel
=
std
::
make_shared
<
MeshDataMaterialSelector
<
std
::
string
>>
(
"physical_names"
,
model
);
model
.
setMaterialSelector
(
mat_sel
);
model
.
initFull
(
_analysis_method
=
_static
);
model
.
applyBC
(
BC
::
Dirichlet
::
FlagOnly
(
_y
),
"ground"
);
model
.
applyBC
(
BC
::
Dirichlet
::
FlagOnly
(
_x
),
"corner"
);
Vector
<
Real
>
trac
=
Vector
<
Real
>::
Zero
(
dim
);
trac
(
_y
)
=
1.
;
model
.
applyBC
(
BC
::
Neumann
::
FromTraction
(
trac
),
"air"
);
model
.
addDumpField
(
"external_force"
);
model
.
addDumpField
(
"internal_force"
);
model
.
addDumpField
(
"blocked_dofs"
);
model
.
addDumpField
(
"displacement"
);
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"grad_u"
);
// model.dump();
auto
&
solver
=
model
.
getNonLinearSolver
(
"static"
);
solver
.
set
(
"max_iterations"
,
1
);
solver
.
set
(
"threshold"
,
1e-8
);
solver
.
set
(
"convergence_type"
,
SolveConvergenceCriteria
::
_residual
);
model
.
solveStep
();
// model.dump();
std
::
map
<
std
::
string
,
Matrix
<
Real
>>
ref_strain
;
ref_strain
[
"strong"
]
=
Matrix
<
Real
,
dim
,
dim
>::
Zero
();
ref_strain
[
"strong"
](
_y
,
_y
)
=
.5
;
ref_strain
[
"weak"
]
=
Matrix
<
Real
,
dim
,
dim
>::
Zero
();
ref_strain
[
"weak"
](
_y
,
_y
)
=
1
;
Matrix
<
Real
,
dim
,
dim
>
ref_stress
=
Matrix
<
Real
,
dim
,
dim
>::
Zero
();
ref_stress
(
_y
,
_y
)
=
1.
;
std
::
vector
<
std
::
string
>
mats
=
{
"strong"
,
"weak"
};
auto
check
=
[](
auto
&&
view
,
const
Matrix
<
Real
>
&
ref
)
->
bool
{
for
(
auto
&&
mat
:
view
)
{
Real
dist
=
(
mat
-
ref
).
norm
();
if
(
dist
>
1e-10
)
{
return
false
;
}
}
return
true
;
};
for
(
const
auto
&
type
:
mesh
.
elementTypes
(
dim
))
{
for
(
auto
mat_id
:
mats
)
{
auto
&
stress
=
model
.
getMaterial
(
mat_id
).
getStress
(
type
);
auto
&
grad_u
=
model
.
getMaterial
(
mat_id
).
getGradU
(
type
);
auto
sview
=
make_view
<
dim
,
dim
>
(
stress
);
auto
gview
=
make_view
<
dim
,
dim
>
(
grad_u
);
if
(
not
check
(
sview
,
ref_stress
))
{
AKANTU_ERROR
(
"The stresses are not correct"
);
}
if
(
not
check
(
gview
,
ref_strain
[
mat_id
]))
{
AKANTU_ERROR
(
"The grad_u are not correct"
);
}
}
}
return
0
;
}
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