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ntn_friction.hh
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rAKA akantu
ntn_friction.hh
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/**
* @file ntn_friction.hh
* @author David Kammer <david.kammer@epfl.ch>
* @date Wed Feb 22 11:40:08 2012
*
* @brief implementation of friction for node to node contact
*
* @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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AST_NTN_FRICTION_HH__
#define __AST_NTN_FRICTION_HH__
/* -------------------------------------------------------------------------- */
// simtools
#include "ntn_contact.hh"
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
/* -------------------------------------------------------------------------- */
class
NTNFriction
:
protected
Memory
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
NTNFriction
(
NTNContact
&
contact
,
const
FrictionID
&
id
=
"friction"
,
const
MemoryID
&
memory_id
=
0
);
virtual
~
NTNFriction
()
{};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public
:
/// compute friction traction
virtual
void
computeFrictionTraction
();
/// compute stick traction (friction traction needed to stick the nodes)
void
computeStickTraction
();
/// apply the friction force
void
applyFrictionTraction
();
/// register Syncronizedarrays for sync
virtual
void
registerSyncronizedArray
(
SyncronizedArrayBase
&
array
);
/// dump restart file
virtual
void
dumpRestart
(
std
::
string
file_name
)
const
;
/// read restart file
virtual
void
readRestart
(
std
::
string
file_name
);
/// function to print the contain of the class
virtual
void
printself
(
std
::
ostream
&
stream
,
int
indent
=
0
)
const
;
protected
:
/// compute frictional strength according to friction law
virtual
void
computeFrictionalStrength
()
=
0
;
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
AKANTU_GET_MACRO
(
Contact
,
contact
,
const
NTNContact
&
)
AKANTU_GET_MACRO
(
IsSticking
,
is_sticking
,
const
SyncronizedArray
<
bool
>
&
)
AKANTU_GET_MACRO
(
FrictionalStrength
,
frictional_strength
,
const
SyncronizedArray
<
Real
>
&
)
AKANTU_GET_MACRO
(
FrictionTraction
,
friction_traction
,
const
SyncronizedArray
<
Real
>
&
)
// set friction coefficient to all nodes
//void setMu(Real mu);
// set friction coefficient only to node (global index)
//void setMu(UInt node, Real mu);
protected
:
void
setInternalArray
(
SyncronizedArray
<
Real
>
&
array
,
Real
value
);
void
setInternalArray
(
SyncronizedArray
<
Real
>
&
array
,
UInt
node
,
Real
value
);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
FrictionID
id
;
NTNContact
&
contact
;
// if node is sticking
SyncronizedArray
<
bool
>
is_sticking
;
// frictional strength
SyncronizedArray
<
Real
>
frictional_strength
;
// friction force
SyncronizedArray
<
Real
>
friction_traction
;
// friction coefficient
//SyncronizedArray<Real> mu;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "ntn_friction_inline_impl.cc"
/// standard output stream operator
inline
std
::
ostream
&
operator
<<
(
std
::
ostream
&
stream
,
const
NTNFriction
&
_this
)
{
_this
.
printself
(
stream
);
return
stream
;
}
__END_SIMTOOLS__
#endif
/* __AST_NTN_FRICTION_HH__ */
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