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test_multi_material_elastic.cc
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rAKA akantu
test_multi_material_elastic.cc
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/**
* @file test_multi_material_elastic.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Mar 03 2017
* @date last modification: Tue Feb 20 2018
*
* @brief Test with 2 elastic materials
*
*
* Copyright (©) 2016-2018 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 "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
);
UInt
spatial_dimension
=
2
;
Mesh
mesh
(
spatial_dimension
);
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
(
spatial_dimension
,
0.
);
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
>
(
spatial_dimension
,
spatial_dimension
,
0.
);
ref_strain
[
"strong"
](
_y
,
_y
)
=
.5
;
ref_strain
[
"weak"
]
=
Matrix
<
Real
>
(
spatial_dimension
,
spatial_dimension
,
0.
);
ref_strain
[
"weak"
](
_y
,
_y
)
=
1
;
Matrix
<
Real
>
ref_stress
(
spatial_dimension
,
spatial_dimension
,
0.
);
ref_stress
(
_y
,
_y
)
=
1.
;
std
::
vector
<
std
::
string
>
mats
=
{
"strong"
,
"weak"
};
typedef
Array
<
Real
>::
const_matrix_iterator
mat_it
;
auto
check
=
[](
mat_it
it
,
mat_it
end
,
const
Matrix
<
Real
>
&
ref
)
->
bool
{
for
(;
it
!=
end
;
++
it
)
{
Real
dist
=
(
*
it
-
ref
).
norm
<
L_2
>
();
// std::cout << *it << " " << dist << " " << (dist < 1e-10 ? "OK" : "Not
// OK") << std::endl;
if
(
dist
>
1e-10
)
return
false
;
}
return
true
;
};
for
(
auto
&
type
:
mesh
.
elementTypes
(
spatial_dimension
))
{
for
(
auto
mat_id
:
mats
)
{
auto
&
stress
=
model
.
getMaterial
(
mat_id
).
getStress
(
type
);
auto
&
grad_u
=
model
.
getMaterial
(
mat_id
).
getGradU
(
type
);
auto
sit
=
stress
.
begin
(
spatial_dimension
,
spatial_dimension
);
auto
send
=
stress
.
end
(
spatial_dimension
,
spatial_dimension
);
auto
git
=
grad_u
.
begin
(
spatial_dimension
,
spatial_dimension
);
auto
gend
=
grad_u
.
end
(
spatial_dimension
,
spatial_dimension
);
if
(
!
check
(
sit
,
send
,
ref_stress
))
AKANTU_ERROR
(
"The stresses are not correct"
);
if
(
!
check
(
git
,
gend
,
ref_strain
[
mat_id
]))
AKANTU_ERROR
(
"The grad_u are not correct"
);
}
}
finalize
();
return
0
;
}
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