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test_solid_mechanics_model_bar_traction2d_mass_not_lumped.cc
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Sun, Oct 20, 03:12
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Tue, Oct 22, 03:12 (2 d)
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rAKA akantu
test_solid_mechanics_model_bar_traction2d_mass_not_lumped.cc
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/**
* @file test_solid_mechanics_model_bar_traction2d_mass_not_lumped.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Tue Dec 20 15:37:09 2011
*
* @brief test of the class SolidMechanicsModel
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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 <limits>
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
akantu
::
ElementType
type
=
akantu
::
_triangle_3
;
akantu
::
SolidMechanicsModel
*
model
;
akantu
::
UInt
spatial_dimension
=
2
;
akantu
::
UInt
nb_nodes
;
akantu
::
UInt
nb_element
;
akantu
::
Array
<
akantu
::
Real
>
*
lumped
;
int
main
(
int
argc
,
char
*
argv
[])
{
akantu
::
initialize
(
argc
,
argv
);
akantu
::
UInt
max_steps
=
5000
;
akantu
::
Real
time_factor
=
0.8
;
// akantu::Real epot, ekin;
akantu
::
Mesh
mesh
(
spatial_dimension
);
akantu
::
MeshIOMSH
mesh_io
;
mesh_io
.
read
(
"bar1.msh"
,
mesh
);
model
=
new
akantu
::
SolidMechanicsModel
(
mesh
);
nb_nodes
=
model
->
getFEEngine
().
getMesh
().
getNbNodes
();
nb_element
=
model
->
getFEEngine
().
getMesh
().
getNbElement
(
type
);
lumped
=
new
akantu
::
Array
<
akantu
::
Real
>
(
nb_nodes
,
spatial_dimension
);
/// model initialization
model
->
initFull
(
"material.dat"
);
std
::
cout
<<
model
->
getMaterial
(
0
)
<<
std
::
endl
;
model
->
initMaterials
();
model
->
initSolver
();
model
->
assembleMass
();
model
->
getMassMatrix
().
lump
(
*
lumped
);
/// boundary conditions
akantu
::
Real
eps
=
1e-16
;
const
akantu
::
Array
<
akantu
::
Real
>
&
pos
=
mesh
.
getNodes
();
akantu
::
Array
<
akantu
::
Real
>
&
disp
=
model
->
getDisplacement
();
akantu
::
Array
<
bool
>
&
boun
=
model
->
getBlockedDOFs
();
for
(
akantu
::
UInt
i
=
0
;
i
<
nb_nodes
;
++
i
)
{
if
(
pos
(
i
,
0
)
>=
9.
)
disp
(
i
,
0
)
=
(
pos
(
i
,
0
)
-
9
)
/
100.
;
if
(
pos
(
i
)
<=
eps
)
boun
(
i
,
0
)
=
true
;
if
(
pos
(
i
,
1
)
<=
eps
||
pos
(
i
,
1
)
>=
1
-
eps
)
boun
(
i
,
1
)
=
true
;
}
/// set the time step
akantu
::
Real
time_step
=
model
->
getStableTimeStep
()
*
time_factor
;
std
::
cout
<<
"Time Step = "
<<
time_step
<<
"s"
<<
std
::
endl
;
model
->
setTimeStep
(
time_step
);
model
->
updateResidual
();
model
->
initialAcceleration
();
model
->
setBaseName
(
"bar2d_mass_not_lumped"
);
model
->
addDumpField
(
"displacement"
);
model
->
addDumpField
(
"velocity"
);
model
->
addDumpField
(
"acceleration"
);
model
->
addDumpField
(
"force"
);
model
->
addDumpField
(
"residual"
);
model
->
dump
();
std
::
ofstream
energy
;
energy
.
open
(
"energy_bar_2d_not_lumped.csv"
);
energy
<<
"id,rtime,epot,ekin,tot"
<<
std
::
endl
;
for
(
akantu
::
UInt
s
=
1
;
s
<=
max_steps
;
++
s
)
{
model
->
explicitPred
();
model
->
updateResidual
();
model
->
updateAcceleration
();
model
->
explicitCorr
();
akantu
::
Real
epot
=
model
->
getPotentialEnergy
();
akantu
::
Real
ekin
=
model
->
getKineticEnergy
();
energy
<<
s
<<
","
<<
(
s
-
1
)
*
time_step
<<
","
<<
epot
<<
","
<<
ekin
<<
","
<<
epot
+
ekin
<<
std
::
endl
;
if
(
s
%
1
==
0
)
model
->
dump
();
if
(
s
%
100
==
0
)
std
::
cout
<<
"passing step "
<<
s
<<
"/"
<<
max_steps
<<
std
::
endl
;
}
energy
.
close
();
delete
model
;
akantu
::
finalize
();
return
EXIT_SUCCESS
;
}
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