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material_elastic.hh
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rAKA akantu
material_elastic.hh
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/**
* @file material_elastic.hh
*
* @author Lucas Frerot <lucas.frerot@epfl.ch>
* @author Daniel Pino Muñoz <daniel.pinomunoz@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Sun Nov 15 2015
*
* @brief Material isotropic 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_thermal.hh"
#include "plane_stress_toolbox.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_ELASTIC_HH__
#define __AKANTU_MATERIAL_ELASTIC_HH__
namespace
akantu
{
/**
* Material elastic isotropic
*
* parameters in the material files :
* - E : Young's modulus (default: 0)
* - nu : Poisson's ratio (default: 1/2)
* - Plane_Stress : if 0: plane strain, else: plane stress (default: 0)
*/
template
<
UInt
spatial_dimension
>
class
MaterialElastic
:
public
PlaneStressToolbox
<
spatial_dimension
,
MaterialThermal
<
spatial_dimension
>>
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
private
:
using
Parent
=
PlaneStressToolbox
<
spatial_dimension
,
MaterialThermal
<
spatial_dimension
>>
;
public
:
MaterialElastic
(
SolidMechanicsModel
&
model
,
const
ID
&
id
=
""
);
MaterialElastic
(
SolidMechanicsModel
&
model
,
UInt
dim
,
const
Mesh
&
mesh
,
FEEngine
&
fe_engine
,
const
ID
&
id
=
""
);
~
MaterialElastic
()
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
=
_not_ghost
)
override
;
/// compute the tangent stiffness matrix for an element type
void
computeTangentModuli
(
const
ElementType
&
el_type
,
Array
<
Real
>
&
tangent_matrix
,
GhostType
ghost_type
=
_not_ghost
)
override
;
/// compute the elastic potential energy
void
computePotentialEnergy
(
ElementType
el_type
,
GhostType
ghost_type
=
_not_ghost
)
override
;
void
computePotentialEnergyByElement
(
ElementType
type
,
UInt
index
,
Vector
<
Real
>
&
epot_on_quad_points
)
override
;
/// compute the p-wave speed in the material
Real
getPushWaveSpeed
(
const
Element
&
element
)
const
override
;
/// compute the s-wave speed in the material
Real
getShearWaveSpeed
(
const
Element
&
element
)
const
override
;
protected
:
/// constitutive law for a given quadrature point
inline
void
computeStressOnQuad
(
const
Matrix
<
Real
>
&
grad_u
,
Matrix
<
Real
>
&
sigma
,
const
Real
sigma_th
=
0
)
const
;
/// compute the tangent stiffness matrix for an element
inline
void
computeTangentModuliOnQuad
(
Matrix
<
Real
>
&
tangent
)
const
;
/// recompute the lame coefficient if E or nu changes
void
updateInternalParameters
()
override
;
static
inline
void
computePotentialEnergyOnQuad
(
const
Matrix
<
Real
>
&
grad_u
,
const
Matrix
<
Real
>
&
sigma
,
Real
&
epot
);
bool
hasStiffnessMatrixChanged
()
override
{
return
(
!
was_stiffness_assembled
);
}
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
/// get first Lame constant
AKANTU_GET_MACRO
(
Lambda
,
lambda
,
Real
);
/// get second Lame constant
AKANTU_GET_MACRO
(
Mu
,
mu
,
Real
);
/// get bulk modulus
AKANTU_GET_MACRO
(
Kappa
,
kpa
,
Real
);
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
/// First Lamé coefficient
Real
lambda
;
/// Second Lamé coefficient (shear modulus)
Real
mu
;
/// Bulk modulus
Real
kpa
;
/// defines if the stiffness was computed
bool
was_stiffness_assembled
;
};
}
// akantu
#include "material_elastic_inline_impl.cc"
#endif
/* __AKANTU_MATERIAL_ELASTIC_HH__ */
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