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material_drucker_prager.cc
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rAKA akantu
material_drucker_prager.cc
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/**
* Copyright (©) 2014-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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/>.
*/
/* -------------------------------------------------------------------------- */
#include "material_drucker_prager.hh"
/* -------------------------------------------------------------------------- */
namespace
akantu
{
template
<
Int
dim
>
MaterialDruckerPrager
<
dim
>::
MaterialDruckerPrager
(
SolidMechanicsModel
&
model
,
const
ID
&
id
,
const
ID
&
fe_engine_id
)
:
MaterialPlastic
<
dim
>
(
model
,
id
,
fe_engine_id
)
{
this
->
registerParam
(
"phi"
,
phi
,
Real
(
0.
),
_pat_parsable
|
_pat_modifiable
,
"Internal friction angle in degrees"
);
this
->
registerParam
(
"fc"
,
fc
,
Real
(
1.
),
_pat_parsable
|
_pat_modifiable
,
"Compressive strength"
);
this
->
registerParam
(
"radial_return"
,
radial_return_mapping
,
bool
(
true
),
_pat_parsable
|
_pat_modifiable
,
"Radial return mapping"
);
}
/* -------------------------------------------------------------------------- */
template
<
Int
dim
>
void
MaterialDruckerPrager
<
dim
>::
updateInternalParameters
()
{
Parent
::
updateInternalParameters
();
// compute alpha and k parameters for Drucker-Prager
Real
phi_radian
=
this
->
phi
*
M_PI
/
180.
;
this
->
alpha
=
(
6.
*
sin
(
phi_radian
))
/
(
3.
-
sin
(
phi_radian
));
Real
cohesion
=
this
->
fc
*
(
1.
-
sin
(
phi_radian
))
/
(
2.
*
cos
(
phi_radian
));
this
->
k
=
(
6.
*
cohesion
*
cos
(
phi_radian
))
/
(
3.
-
sin
(
phi_radian
));
}
/* -------------------------------------------------------------------------- */
template
<
Int
dim
>
void
MaterialDruckerPrager
<
dim
>::
computeStress
(
ElementType
el_type
,
GhostType
ghost_type
)
{
if
(
this
->
finite_deformation
)
{
AKANTU_TO_IMPLEMENT
();
}
MaterialThermal
<
dim
>::
computeStress
(
el_type
,
ghost_type
);
// infinitesimal and finite deformation
for
(
auto
&&
args
:
Parent
::
getArguments
(
el_type
,
ghost_type
))
{
computeStressOnQuad
(
args
);
}
}
/* -------------------------------------------------------------------------- */
template
class
MaterialDruckerPrager
<
1
>
;
template
class
MaterialDruckerPrager
<
2
>
;
template
class
MaterialDruckerPrager
<
3
>
;
const
bool
material_is_allocated_plastic_drucker_prager
[[
maybe_unused
]]
=
instantiateMaterial
<
MaterialDruckerPrager
>
(
"plastic_drucker_prager"
);
}
// namespace akantu
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