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Sat, Aug 17, 07:20
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rAKA akantu
material_brittle.hh
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/**
* @file material_brittle.hh
*
* @author Aranda Ruiz Josue <josue.arandaruiz@epfl.ch>
* @author Daniel Pino Muñoz <daniel.pinomunoz@epfl.ch>
*
*
* @brief Brittle damage law
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "material_damage.hh"
#include "material.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_MATERIAL_BRITTLE_HH__
#define __AKANTU_MATERIAL_BRITTLE_HH__
__BEGIN_AKANTU__
/**
* Material brittle
*
* parameters in the material files :
* - S_0 : Critical stress at low strain rate (default: 157e6)
* - E_0 : Low strain rate threshold (default: 27e3)
* - A,B,C,D : Fitting parameters for the critical stress at high strain rates
* (default: 1.622e-11, -1.3274e-6, 3.6544e-2, -181.38)
*/
template
<
UInt
spatial_dimension
>
class
MaterialBrittle
:
public
MaterialDamage
<
spatial_dimension
>
{
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public
:
MaterialBrittle
(
SolidMechanicsModel
&
model
,
const
ID
&
id
=
""
);
virtual
~
MaterialBrittle
()
{};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public
:
void
initMaterial
();
virtual
void
updateInternalParameters
();
/// constitutive law for all element of a type
void
computeStress
(
ElementType
el_type
,
GhostType
ghost_type
=
_not_ghost
);
protected
:
/// constitutive law for a given quadrature point
inline
void
computeStressOnQuad
(
Matrix
<
Real
>
&
grad_u
,
Matrix
<
Real
>
&
grad_v
,
Matrix
<
Real
>
&
sigma
,
Real
&
dam
,
Real
&
sigma_equivalent
,
Real
&
fracture_stress
);
inline
void
computeDamageAndStressOnQuad
(
Matrix
<
Real
>
&
sigma
,
Real
&
dam
,
Real
&
sigma_c
,
Real
&
fracture_stress
);
/* ------------------------------------------------------------------------ */
/* DataAccessor inherited members */
/* ------------------------------------------------------------------------ */
public
:
inline
virtual
UInt
getNbDataForElements
(
const
Array
<
Element
>
&
elements
,
SynchronizationTag
tag
)
const
;
inline
virtual
void
packElementData
(
CommunicationBuffer
&
buffer
,
const
Array
<
Element
>
&
elements
,
SynchronizationTag
tag
)
const
;
inline
virtual
void
unpackElementData
(
CommunicationBuffer
&
buffer
,
const
Array
<
Element
>
&
elements
,
SynchronizationTag
tag
);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public
:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected
:
/// strain rate arrays ordered by element types
InternalField
<
Real
>
strain_rate_brittle
;
//polynome constants for critical stress value
Real
A
;
Real
B
;
Real
C
;
Real
D
;
//minimum strain rate
Real
E_0
;
//Critical stress at low strain rates
Real
S_0
;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
#include "material_brittle_inline_impl.cc"
__END_AKANTU__
#endif
/* __AKANTU_MATERIAL_brittle_HH__ */
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