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element.hh
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Wed, Dec 11, 14:10
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rAKA akantu
element.hh
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/**
* @file element.hh
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date creation: Fri Jan 04 2013
* @date last modification: Wed Mar 13 2013
*
* @brief contact element classes
*
* @section LICENSE
*
* Copyright (©) 2014 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_CELEMENT_HH__
#define __AKANTU_CELEMENT_HH__
#include <iostream>
#include "aka_common.hh"
#include "aka_point.hh"
#include "solid_mechanics_model.hh"
#include "mesh.hh"
#include "contact_common.hh"
#if AKANTU_OPTIMIZATION
# include "aka_optimize.hh"
#endif
__BEGIN_AKANTU__
using
std
::
cout
;
using
std
::
endl
;
// compute signed measure, used to find out if a node penetrates or not
template
<
int
d
>
bool
check_penetration
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
);
template
<
int
d
>
Point
<
d
>
minimize_distance
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
);
template
<
int
d
>
Real
distance
(
UInt
node
,
const
Element
*
el
,
SolidMechanicsModel
&
model
)
{
typedef
Point
<
d
>
point_type
;
const
Array
<
Real
>
&
x
=
model
.
getCurrentPosition
();
// get point of node
point_type
o
(
&
x
(
node
));
// compute closest location within the element to master node
point_type
p
=
minimize_distance
<
d
>
(
node
,
el
,
model
);
return
sqrt
((
o
-
p
).
sq_norm
());
}
template
<
int
d
>
class
CElement
{
typedef
Point
<
d
>
point_type
;
typedef
const
Element
*
element_pointer
;
UInt
master_
;
//!< Slave node
element_pointer
element_
;
//!< Master surface element
SolidMechanicsModel
&
model_
;
public
:
CElement
(
UInt
n
,
element_pointer
el
,
SolidMechanicsModel
&
model
)
:
master_
(
n
),
element_
(
el
),
model_
(
model
)
{}
//! Checks if there is penetration between the master node and the element
bool
penetrates
()
const
{
#ifdef DEBUG_CONTACT
cout
<<
"*** INFO *** Checking penetration for"
<<*
this
<<
endl
;
#endif
return
check_penetration
<
d
>
(
master_
,
element_
,
model_
);
}
void
remove_penetration
()
const
{
#ifdef DEBUG_CONTACT
cout
<<
"*** INFO *** Removing penetration for master node "
<<
master_
<<
endl
;
#endif
cout
<<
"before calling minimize distance"
<<
endl
;
// compute closest location within the element to master node
point_type
o
=
minimize_distance
<
d
>
(
master_
,
element_
,
model_
);
cout
<<
"after calling minimize"
<<
endl
;
cout
<<
"point obtained -> "
<<
o
<<
endl
;
// modify master node coordinates
Array
<
Real
>
&
X
=
model_
.
getDisplacement
();
const
Array
<
Real
>
&
coord
=
model_
.
getMesh
().
getNodes
();
for
(
UInt
i
=
0
;
i
<
d
;
++
i
)
X
(
master_
,
i
)
=
o
[
i
]
-
coord
(
master_
,
i
);
cout
<<
"after modifying master node coords"
<<
endl
;
}
//! Enable std output
friend
std
::
ostream
&
operator
<<
(
std
::
ostream
&
os
,
const
CElement
&
cel
)
{
Mesh
&
mesh
=
cel
.
model_
.
getMesh
();
const
Array
<
Real
>
&
x
=
cel
.
model_
.
getCurrentPosition
();
UInt
nb_nodes
=
mesh
.
getNbNodesPerElement
((
cel
.
element_
)
->
type
);
const
Array
<
UInt
>
&
conn
=
mesh
.
getConnectivity
((
cel
.
element_
)
->
type
);
os
<<
" Contact element: "
<<
endl
;
os
<<
" slave node: "
<<
cel
.
master_
<<
", coordinates: "
<<
point_type
(
&
x
(
cel
.
master_
))
<<
endl
;
os
<<
" master surface element: "
<<*
cel
.
element_
<<
", with extreme nodes"
;
for
(
int
i
=
0
;
i
<
d
;
++
i
)
os
<<
" - "
<<
point_type
(
&
x
(
conn
((
cel
.
element_
)
->
element
,
i
)));
os
<<
endl
;
return
os
;
}
};
__END_AKANTU__
#endif
/* __AKANTU_CELEMENT_HH__ */
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