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ntn_friction_linear_slip_weakening.hh
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rAKA akantu
ntn_friction_linear_slip_weakening.hh
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/**
* @file ntn_friction_linear_slip_weakening.hh
* @author David Kammer <david.kammer@epfl.ch>
* @date Tue Nov 20 14:56:20 2012
*
* @brief linear slip weakening friction
*
* @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_LINEAR_SLIP_WEAKENING_HH__
#define __AST_NTN_FRICTION_LINEAR_SLIP_WEAKENING_HH__
/* -------------------------------------------------------------------------- */
// simtools
#include "ntn_contact.hh"
#include "ntn_friction_coulomb.hh"
__BEGIN_SIMTOOLS__
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
/* -------------------------------------------------------------------------- */
class
NTNFrictionLinearSlipWeakening
:
public
NTNFrictionCoulomb
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
NTNFrictionLinearSlipWeakening
(
NTNContact
&
contact
,
const
FrictionID
&
id
=
"friction_linear_slip_weakening"
,
const
MemoryID
&
memory_id
=
0
);
virtual
~
NTNFrictionLinearSlipWeakening
()
{};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public
:
/// register synchronizedarrays for sync
virtual
void
registerSynchronizedArray
(
SynchronizedArrayBase
&
array
);
/// dump restart file
virtual
void
dumpRestart
(
const
std
::
string
&
file_name
)
const
;
/// read restart file
virtual
void
readRestart
(
const
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
();
// computes the friction coefficient as a function of slip
virtual
void
computeFrictionCoefficient
();
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
// set static friction coefficient to all nodes
void
setMuS
(
Real
mu
);
// set static friction coefficient only to node (global index)
void
setMuS
(
UInt
node
,
Real
mu
);
// set kinetic friction coefficient to all nodes
void
setMuK
(
Real
mu
);
// set kinetic friction coefficient only to node (global index)
void
setMuK
(
UInt
node
,
Real
mu
);
// set weakening length to all nodes
void
setWeakeningLength
(
Real
length
);
// set weakening length only to node (global index)
void
setWeakeningLength
(
UInt
node
,
Real
length
);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
// Dc the length over which slip weakening happens
SynchronizedArray
<
Real
>
weakening_length
;
// static coefficient of friction
SynchronizedArray
<
Real
>
mu_s
;
// kinetic coefficient of friction
SynchronizedArray
<
Real
>
mu_k
;
// internal variable = absolut value of tangential gap when last sticked
SynchronizedArray
<
Real
>
slip
;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
//#include "ntn_friction_linear_slip_weakening_inline_impl.cc"
/// standard output stream operator
inline
std
::
ostream
&
operator
<<
(
std
::
ostream
&
stream
,
const
NTNFrictionLinearSlipWeakening
&
_this
)
{
_this
.
printself
(
stream
);
return
stream
;
}
__END_SIMTOOLS__
#endif
/* __AST_NTN_FRICTION_LINEAR_SLIP_WEAKENING_HH__ */
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