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blocks.cc
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Mon, Aug 26, 10:21
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rAKA akantu
blocks.cc
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/**
* @file blocks.cc
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date creation: Sun Oct 19 2014
*
* @brief Example of two blocks in contact
*
* @section LICENSE
*
* Copyright (©) 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 <iostream>
#include <chrono>
#include "contact_impl.hh"
using
namespace
akantu
;
using
std
::
cout
;
using
std
::
endl
;
int
main
(
int
argc
,
char
*
argv
[])
{
// set dimension
static
const
UInt
dim
=
2
;
typedef
std
::
chrono
::
high_resolution_clock
clock
;
typedef
std
::
chrono
::
seconds
seconds
;
typedef
SolidMechanicsModel
model_type
;
typedef
Contact
<
dim
,
MasterAssignator
,
SelectResolution
<
_static
,
_augmented_lagrangian
>
>
contact_type
;
// capture initial time
clock
::
time_point
t0
=
clock
::
now
();
initialize
(
"steel.dat"
,
argc
,
argv
);
// create and read mesh
Mesh
mesh
(
dim
);
mesh
.
read
(
"blocks.msh"
);
// create model
model_type
model
(
mesh
);
SolidMechanicsModelOptions
opt
(
_static
);
// initialize material
model
.
initFull
(
opt
);
// setup paraview dumper
model
.
setBaseName
(
"contact"
);
model
.
addDumpFieldVector
(
"displacement"
);
// create data structure that holds contact data
contact_type
cd
(
argc
,
argv
,
model
);
// get areas for slave nodes
mesh
.
createGroupsFromMeshData
<
std
::
string
>
(
"physical_names"
);
model
.
applyBC
(
BC
::
Neumann
::
FromHigherDim
(
Matrix
<
Real
>::
eye
(
2
,
1.
)),
"interface_top"
);
Array
<
Real
>&
areas
=
model
.
getForce
();
ElementGroup
&
eg
=
mesh
.
getElementGroup
(
"interface_top"
);
for
(
auto
nit
=
eg
.
node_begin
();
nit
!=
eg
.
node_end
();
++
nit
)
{
// add slave node
cd
.
addSlave
(
*
nit
);
// compute and add area
Real
a
=
0.
;
for
(
UInt
i
=
0
;
i
<
dim
;
++
i
)
a
+=
pow
(
areas
(
*
nit
,
i
),
2.
);
cd
.
addArea
(
*
nit
,
sqrt
(
a
));
}
// set force value to zero
areas
.
clear
();
// add master surface to find pairs
cd
.
searchSurface
(
"interface_bottom"
);
// apply boundary conditions
using
BC
::
Dirichlet
::
FixedValue
;
model
.
applyBC
(
FixedValue
(
0.
,
_x
),
"bottom"
);
model
.
applyBC
(
FixedValue
(
0.
,
_y
),
"bottom"
);
model
.
applyBC
(
FixedValue
(
0.
,
_x
),
"top"
);
Real
U
=
0.5
;
Real
Du
=
0.005
;
// loop over command line parameters
for
(
int
i
=
0
;
i
<
argc
;
++
i
)
{
if
(
strcmp
(
argv
[
i
],
"-steps"
)
==
0
)
{
Real
steps
=
atof
(
argv
[
++
i
]);
cout
<<
"-steps = "
<<
steps
<<
endl
;
Du
=
U
/
steps
;
}
}
// loop over load increments
for
(
Real
u
=
Du
;
u
<=
U
;
u
+=
Du
)
{
model
.
applyBC
(
FixedValue
(
-
u
,
_y
),
"top"
);
solveContactStep
<
_generalized_newton
>
(
cd
);
}
clock
::
time_point
t1
=
clock
::
now
();
seconds
total_s
=
std
::
chrono
::
duration_cast
<
seconds
>
(
t1
-
t0
);
cout
<<
"- Simulation took "
<<
total_s
.
count
()
<<
" s"
<<
endl
;
// finalize simulation
finalize
();
return
EXIT_SUCCESS
;
}
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