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test_solid_mechanics_model_bar_traction2d_structured_pbc.cc
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Sat, Oct 19, 11:07
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Mon, Oct 21, 11:07 (2 d)
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rAKA akantu
test_solid_mechanics_model_bar_traction2d_structured_pbc.cc
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/**
* @file test_solid_mechanics_model_bar_traction2d_structured_pbc.cc
*
* @author David Simon Kammer <david.kammer@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Thu Dec 22 2011
* @date last modification: Thu Aug 06 2015
*
* @brief test of pbc class for SolidMechanicsModel
*
* @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"
/* -------------------------------------------------------------------------- */
int
main
(
int
argc
,
char
*
argv
[])
{
akantu
::
debug
::
setDebugLevel
(
akantu
::
dblWarning
);
akantu
::
initialize
(
"material.dat"
,
argc
,
argv
);
akantu
::
UInt
spatial_dimension
=
2
;
akantu
::
UInt
max_steps
=
1000
;
akantu
::
Real
time_factor
=
0.2
;
akantu
::
Real
epot
,
ekin
;
akantu
::
Mesh
mesh
(
spatial_dimension
);
mesh
.
read
(
"bar_structured1.msh"
);
akantu
::
SolidMechanicsModel
model
(
mesh
);
/// model initialization
model
.
initFull
();
std
::
cout
<<
model
.
getMaterial
(
0
)
<<
std
::
endl
;
model
.
setPBC
(
1
,
0
,
0
);
model
.
initPBC
();
model
.
assembleMassLumped
();
model
.
setBaseName
(
"bar2d_structured_pbc"
);
model
.
addDumpField
(
"displacement"
);
model
.
addDumpField
(
"mass"
);
model
.
addDumpField
(
"velocity"
);
model
.
addDumpField
(
"acceleration"
);
model
.
addDumpFieldVector
(
"external_force"
);
model
.
addDumpFieldVector
(
"internal_force"
);
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"strain"
);
model
.
dump
();
akantu
::
UInt
nb_nodes
=
mesh
.
getNbNodes
();
/// boundary conditions
mesh
.
computeBoundingBox
();
akantu
::
Real
eps
=
1e-16
;
akantu
::
Real
signal_start
=
0.6
*
mesh
.
getUpperBounds
()(
0
);
akantu
::
Real
signal_end
=
0.7
*
mesh
.
getUpperBounds
()(
0
);
akantu
::
Real
delta_d
=
signal_end
-
signal_start
;
akantu
::
Real
signal
=
1.
;
const
akantu
::
Array
<
akantu
::
Real
>
&
coords
=
model
.
getFEEngine
().
getMesh
().
getNodes
();
akantu
::
Array
<
akantu
::
Real
>
&
disp
=
model
.
getDisplacement
();
for
(
akantu
::
UInt
i
=
0
;
i
<
nb_nodes
;
++
i
)
{
if
(
coords
(
i
,
0
)
>=
signal_start
&&
coords
(
i
,
0
)
<=
signal_end
)
{
if
(
coords
(
i
,
0
)
<=
0.5
*
(
signal_start
+
signal_end
))
disp
(
i
,
0
)
=
(
coords
(
i
,
0
)
-
signal_start
)
*
2
*
signal
/
delta_d
;
else
disp
(
i
,
0
)
=
(
signal_end
-
coords
(
i
,
0
))
*
2
*
signal
/
delta_d
;
}
if
(
coords
(
i
,
1
)
<=
eps
||
coords
(
i
,
1
)
>=
1
-
eps
)
{
model
.
getBlockedDOFs
().
storage
()[
spatial_dimension
*
i
+
1
]
=
true
;
}
}
akantu
::
Real
time_step
=
model
.
getStableTimeStep
()
*
time_factor
;
std
::
cout
<<
"Time Step = "
<<
time_step
<<
"s"
<<
std
::
endl
;
model
.
setTimeStep
(
time_step
);
std
::
ofstream
energy
;
energy
.
open
(
"energy_2d_pbc.csv"
);
energy
<<
"id,epot,ekin,tot"
<<
std
::
endl
;
for
(
akantu
::
UInt
s
=
1
;
s
<=
max_steps
;
++
s
)
{
model
.
explicitPred
();
model
.
updateResidual
();
model
.
updateAcceleration
();
model
.
explicitCorr
();
epot
=
model
.
getEnergy
(
"potential"
);
ekin
=
model
.
getEnergy
(
"kinetic"
);
if
(
s
%
20
==
0
)
model
.
dump
();
std
::
cerr
<<
"passing step "
<<
s
<<
"/"
<<
max_steps
<<
std
::
endl
;
energy
<<
s
<<
","
<<
epot
<<
","
<<
ekin
<<
","
<<
epot
+
ekin
<<
std
::
endl
;
}
energy
.
close
();
return
EXIT_SUCCESS
;
}
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