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material_thermal.hh
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Mon, Aug 26, 14:50
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rAKA akantu
material_thermal.hh
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/**
* @file material_thermal.hh
*
* @author Lucas Frerot <lucas.frerot@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Tue Aug 18 2015
*
* @brief Material isotropic thermo-elastic
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_THERMAL_HH__
#define __AKANTU_MATERIAL_THERMAL_HH__
namespace
akantu
{
template
<
UInt
spatial_dimension
>
class
MaterialThermal
:
public
Material
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
MaterialThermal
(
SolidMechanicsModel
&
model
,
const
ID
&
id
=
""
);
MaterialThermal
(
SolidMechanicsModel
&
model
,
UInt
dim
,
const
Mesh
&
mesh
,
FEEngine
&
fe_engine
,
const
ID
&
id
=
""
);
~
MaterialThermal
()
override
=
default
;
protected
:
void
initialize
();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public
:
void
initMaterial
()
override
;
/// constitutive law for all element of a type
void
computeStress
(
ElementType
el_type
,
GhostType
ghost_type
)
override
;
/// local computation of thermal stress
inline
void
computeStressOnQuad
(
Real
&
sigma
,
const
Real
&
deltaT
);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
/// Young modulus
Real
E
;
/// Poisson ratio
Real
nu
;
/// Thermal expansion coefficient
/// TODO : implement alpha as a matrix
Real
alpha
;
/// Temperature field
InternalField
<
Real
>
delta_T
;
/// Current thermal stress
InternalField
<
Real
>
sigma_th
;
/// Tell if we need to use the previous thermal stress
bool
use_previous_stress_thermal
;
};
/* ------------------------------------------------------------------------ */
/* Inline impl */
/* ------------------------------------------------------------------------ */
template
<
UInt
dim
>
inline
void
MaterialThermal
<
dim
>::
computeStressOnQuad
(
Real
&
sigma
,
const
Real
&
deltaT
)
{
sigma
=
-
this
->
E
/
(
1.
-
2.
*
this
->
nu
)
*
this
->
alpha
*
deltaT
;
}
template
<>
inline
void
MaterialThermal
<
1
>::
computeStressOnQuad
(
Real
&
sigma
,
const
Real
&
deltaT
)
{
sigma
=
-
this
->
E
*
this
->
alpha
*
deltaT
;
}
}
// akantu
#endif
/* __AKANTU_MATERIAL_THERMAL_HH__ */
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