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colone_weight.cc
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Tue, Sep 3, 11:45
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rAKA akantu
colone_weight.cc
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/**
* @file colone_weight.cc
*
* @author David Simon Kammer <david.kammer@epfl.ch>
* @author Alodie Schneuwly <alodie.schneuwly@epfl.ch>
*
* @date creation: Mon Aug 09 2010
* @date last modification: Thu Aug 06 2015
*
* @brief column test
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 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 <iostream>
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
int
main
(
int
argc
,
char
*
argv
[])
{
// chose if you use hexahedron elements
bool
use_hexa
=
false
;
std
::
stringstream
mesh_file
;
std
::
stringstream
output
;
std
::
stringstream
energy_file
;
akantu
::
ElementType
type
;
UInt
vel_damping_interval
;
if
(
use_hexa
)
{
type
=
akantu
::
_hexahedron_8
;
mesh_file
<<
"colone_hexa.msh"
;
output
<<
"paraview/test_weight_hexa"
;
energy_file
<<
"energy_hexa.csv"
;
vel_damping_interval
=
4
;
}
else
{
type
=
akantu
::
_tetrahedron_4
;
mesh_file
<<
"colone_tetra.msh"
;
output
<<
"paraview/test_weight_tetra"
;
energy_file
<<
"energy_tetra.csv"
;
vel_damping_interval
=
8
;
}
akantu
::
UInt
spatial_dimension
=
3
;
akantu
::
UInt
max_steps
=
2000
;
akantu
::
Real
time_factor
=
0.8
;
akantu
::
initialize
(
"material_colone.dat"
,
argc
,
argv
);
// akantu::Real epot, ekin;
akantu
::
Mesh
mesh
(
spatial_dimension
);
mesh
.
read
(
mesh_file
.
str
().
c_str
());
akantu
::
SolidMechanicsModel
model
(
mesh
);
akantu
::
UInt
nb_nodes
=
mesh
.
getNbNodes
();
akantu
::
UInt
nb_element
=
mesh
.
getNbElement
(
type
);
std
::
cout
<<
"Nb nodes : "
<<
nb_nodes
<<
" - nb elements : "
<<
nb_element
<<
std
::
endl
;
/// model initialization
model
.
initFull
();
std
::
cout
<<
model
.
getMaterial
(
0
)
<<
std
::
endl
;
model
.
assembleMassLumped
();
/// boundary conditions
const
akantu
::
Array
<
Real
>
&
position
=
model
.
getFEEngine
().
getMesh
().
getNodes
();
akantu
::
Array
<
bool
>
&
boundary
=
model
.
getBlockedDOFs
();
akantu
::
Array
<
Real
>
&
force
=
model
.
getForce
();
const
akantu
::
Array
<
Real
>
&
mass
=
model
.
getMass
();
akantu
::
Real
z_min
=
position
(
0
,
2
);
for
(
unsigned
int
i
=
0
;
i
<
nb_nodes
;
++
i
)
{
if
(
position
(
i
,
2
)
<
z_min
)
z_min
=
position
(
i
,
2
);
}
akantu
::
Real
eps
=
1e-13
;
for
(
akantu
::
UInt
i
=
0
;
i
<
nb_nodes
;
++
i
)
{
if
(
fabs
(
position
(
i
,
2
)
-
z_min
)
<=
eps
)
boundary
(
i
,
2
)
=
true
;
else
force
(
i
,
2
)
=
-
mass
(
i
,
0
)
*
9.81
;
}
akantu
::
Real
time_step
=
model
.
getStableTimeStep
()
*
time_factor
;
std
::
cout
<<
"Time Step = "
<<
time_step
<<
"s"
<<
std
::
endl
;
model
.
setTimeStep
(
time_step
);
model
.
updateResidual
();
model
.
setBaseName
(
"colonne_weight"
);
model
.
addDumpField
(
"displacement"
);
model
.
addDumpField
(
"mass"
);
model
.
addDumpField
(
"velocity"
);
model
.
addDumpField
(
"acceleration"
);
model
.
addDumpField
(
"force"
);
model
.
addDumpField
(
"residual"
);
model
.
addDumpField
(
"damage"
);
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"strain"
);
model
.
dump
();
akantu
::
Array
<
Real
>
&
velocity
=
model
.
getVelocity
();
std
::
ofstream
energy
;
energy
.
open
(
energy_file
.
str
().
c_str
());
energy
<<
"id,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
.
getEnergy
(
"potential"
);
akantu
::
Real
ekin
=
model
.
getEnergy
(
"kinetic"
);
energy
<<
s
<<
","
<<
epot
<<
","
<<
ekin
<<
","
<<
epot
+
ekin
<<
std
::
endl
;
if
(
s
%
vel_damping_interval
==
0
)
{
for
(
akantu
::
UInt
i
=
0
;
i
<
nb_nodes
;
++
i
)
{
velocity
(
i
,
0
)
*=
0.9
;
velocity
(
i
,
1
)
*=
0.9
;
velocity
(
i
,
2
)
*=
0.9
;
}
}
if
(
s
%
1
==
0
)
model
.
dump
();
if
(
s
%
10
==
0
)
std
::
cout
<<
"passing step "
<<
s
<<
"/"
<<
max_steps
<<
std
::
endl
;
}
akantu
::
finalize
();
return
EXIT_SUCCESS
;
}
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