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epic.cpp
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rTAMAAS tamaas
epic.cpp
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/**
* @file
*
* @author Lucas Frérot <lucas.frerot@epfl.ch>
*
* @section LICENSE
*
* Copyright (©) 2016-2017 EPFL (Ecole Polytechnique Fédérale de
* Lausanne) Laboratory (LSMS - Laboratoire de Simulation en Mécanique des
* Solides)
*
* Tamaas 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.
*
* Tamaas 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 Tamaas. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "epic.hh"
/* -------------------------------------------------------------------------- */
namespace
tamaas
{
/* -------------------------------------------------------------------------- */
EPICSolver
::
EPICSolver
(
ContactSolver
&
csolver
,
EPSolver
&
epsolver
,
Real
tolerance
)
:
csolver
(
csolver
),
epsolver
(
epsolver
),
tolerance
(
tolerance
)
{
auto
&
model
=
csolver
.
getModel
();
surface
.
wrap
(
csolver
.
getSurface
());
pressure
.
resize
(
model
.
getTraction
().
getNbPoints
());
#define SET_VIEWS(_, __, type) \
case type: { \
setViews<type>(); \
break; \
}
switch
(
model
.
getType
())
{
BOOST_PP_SEQ_FOR_EACH
(
SET_VIEWS
,
~
,
TAMAAS_MODEL_TYPES
);
}
#undef SET_VIEWS
}
/* -------------------------------------------------------------------------- */
void
EPICSolver
::
solve
(
Real
load
)
{
UInt
n
=
0
,
nmax
=
100
;
Real
error
=
0.
;
const
GridBase
<
Real
>
initial_surface
(
surface
);
Real
normalizing_factor
=
std
::
sqrt
(
initial_surface
.
dot
(
initial_surface
));
GridBase
<
Real
>
previous_residual
(
*
residual_disp
);
GridBase
<
Real
>
relaxation_direction
(
*
residual_disp
);
previous_residual
=
0
;
do
{
csolver
.
solve
(
load
);
// solve contact problem
*
pressure_inc
-=
pressure
;
// compute pressure increment
epsolver
.
solve
();
// compute residual displacement
surface
=
initial_surface
;
relaxation_direction
=
*
residual_disp
;
relaxation_direction
-=
previous_residual
;
relaxation_direction
*=
0.5
;
error
=
computeError
(
*
residual_disp
,
previous_residual
,
normalizing_factor
);
previous_residual
+=
relaxation_direction
;
surface
-=
previous_residual
;
// update surface
std
::
cout
<<
"error = "
<<
std
::
scientific
<<
error
<<
std
::
fixed
<<
std
::
endl
;
}
while
(
error
>
tolerance
&&
n
++
<
nmax
);
// computing full pressure
pressure
+=
*
pressure_inc
;
// setting the model pressure to full converged pressure
*
pressure_inc
=
pressure
;
// updating plastic state
epsolver
.
getResidual
().
updateState
(
epsolver
.
getStrainIncrement
());
csolver
.
getModel
().
dump
();
}
/* -------------------------------------------------------------------------- */
Real
EPICSolver
::
computeError
(
const
GridBase
<
Real
>&
current
,
const
GridBase
<
Real
>&
prev
,
Real
factor
)
const
{
GridBase
<
Real
>
error
(
current
);
error
-=
prev
;
return
std
::
sqrt
(
error
.
dot
(
error
))
/
factor
;
}
/* -------------------------------------------------------------------------- */
}
// namespace tamaas
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