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ntn_fricreg_rubin_ampuero.cc
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Fri, Sep 6, 09:02
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text/x-c
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Sun, Sep 8, 09:02 (2 d)
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rAKA akantu
ntn_fricreg_rubin_ampuero.cc
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/**
* @file ntn_fricreg_rubin_ampuero.cc
*
* @author David Simon Kammer <david.kammer@epfl.ch>
*
* @date creation: Tue Dec 02 2014
* @date last modification: Fri Feb 23 2018
*
* @brief implementation of no regularisation
*
*
* Copyright (©) 2015-2018 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/>.
*
*/
/* -------------------------------------------------------------------------- */
// simtools
#include "ntn_fricreg_rubin_ampuero.hh"
#include "dumper_nodal_field.hh"
#include "dumper_text.hh"
namespace
akantu
{
/* -------------------------------------------------------------------------- */
NTNFricRegRubinAmpuero
::
NTNFricRegRubinAmpuero
(
NTNBaseContact
&
contact
,
const
ID
&
id
,
const
MemoryID
&
memory_id
)
:
NTNFricRegNoRegularisation
(
contact
,
id
,
memory_id
),
t_star
(
0
,
1
,
0.
,
id
+
":t_star"
,
0.
,
"t_star"
)
{
AKANTU_DEBUG_IN
();
NTNFricRegNoRegularisation
::
registerSynchronizedArray
(
this
->
t_star
);
this
->
registerParam
(
"t_star"
,
this
->
t_star
,
_pat_parsmod
,
"time scale of regularization"
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
const
SynchronizedArray
<
Real
>
&
NTNFricRegRubinAmpuero
::
internalGetContactPressure
()
{
AKANTU_DEBUG_IN
();
SolidMechanicsModel
&
model
=
this
->
contact
.
getModel
();
UInt
dim
=
model
.
getSpatialDimension
();
Real
delta_t
=
model
.
getTimeStep
();
// get contact arrays
const
SynchronizedArray
<
bool
>
&
is_in_contact
=
this
->
internalGetIsInContact
();
const
Array
<
Real
>
&
pressure
=
this
->
contact
.
getContactPressure
().
getArray
();
Array
<
Real
>::
const_iterator
<
Vector
<
Real
>>
it
=
pressure
.
begin
(
dim
);
UInt
nb_contact_nodes
=
this
->
contact
.
getNbContactNodes
();
for
(
UInt
n
=
0
;
n
<
nb_contact_nodes
;
++
n
)
{
// node pair is NOT in contact
if
(
!
is_in_contact
(
n
))
this
->
frictional_contact_pressure
(
n
)
=
0.
;
// if t_star is too small compute like Coulomb friction (without
// regularization)
else
if
(
Math
::
are_float_equal
(
this
->
t_star
(
n
),
0.
))
{
const
Vector
<
Real
>
&
pres
=
it
[
n
];
this
->
frictional_contact_pressure
(
n
)
=
pres
.
norm
();
}
else
{
// compute frictional contact pressure
// backward euler method: first order implicit numerical integration
// method
// \reg_pres_n+1 = (\reg_pres_n + \delta_t / \t_star * \cur_pres)
// / (1 + \delta_t / \t_star)
Real
alpha
=
delta_t
/
this
->
t_star
(
n
);
const
Vector
<
Real
>
&
pres
=
it
[
n
];
this
->
frictional_contact_pressure
(
n
)
+=
alpha
*
pres
.
norm
();
this
->
frictional_contact_pressure
(
n
)
/=
1
+
alpha
;
}
}
AKANTU_DEBUG_OUT
();
return
this
->
frictional_contact_pressure
;
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
setToSteadyState
()
{
AKANTU_DEBUG_IN
();
NTNFricRegNoRegularisation
::
computeFrictionalContactPressure
();
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
registerSynchronizedArray
(
SynchronizedArrayBase
&
array
)
{
AKANTU_DEBUG_IN
();
this
->
t_star
.
registerDependingArray
(
array
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
dumpRestart
(
const
std
::
string
&
file_name
)
const
{
AKANTU_DEBUG_IN
();
this
->
t_star
.
dumpRestartFile
(
file_name
);
NTNFricRegNoRegularisation
::
dumpRestart
(
file_name
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
readRestart
(
const
std
::
string
&
file_name
)
{
AKANTU_DEBUG_IN
();
this
->
t_star
.
readRestartFile
(
file_name
);
NTNFricRegNoRegularisation
::
readRestart
(
file_name
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
printself
(
std
::
ostream
&
stream
,
int
indent
)
const
{
AKANTU_DEBUG_IN
();
std
::
string
space
;
for
(
Int
i
=
0
;
i
<
indent
;
i
++
,
space
+=
AKANTU_INDENT
)
;
stream
<<
space
<<
"NTNFricRegRubinAmpuero ["
<<
std
::
endl
;
NTNFricRegNoRegularisation
::
printself
(
stream
,
++
indent
);
stream
<<
space
<<
"]"
<<
std
::
endl
;
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
NTNFricRegRubinAmpuero
::
addDumpFieldToDumper
(
const
std
::
string
&
dumper_name
,
const
std
::
string
&
field_id
)
{
AKANTU_DEBUG_IN
();
#ifdef AKANTU_USE_IOHELPER
// const SynchronizedArray<UInt> * nodal_filter =
// &(this->contact.getSlaves());
if
(
field_id
==
"t_star"
)
{
this
->
internalAddDumpFieldToDumper
(
dumper_name
,
field_id
,
std
::
make_unique
<
dumpers
::
NodalField
<
Real
>>
(
this
->
t_star
.
getArray
()));
}
else
{
NTNFricRegNoRegularisation
::
addDumpFieldToDumper
(
dumper_name
,
field_id
);
}
#endif
AKANTU_DEBUG_OUT
();
}
}
// namespace akantu
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