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material_viscoplastic.cc
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Thu, Aug 22, 06:57
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rAKA akantu
material_viscoplastic.cc
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/**
* @file material_viscoplastic.cc
*
* @author Ramin Aghababaei <ramin.aghababaei@epfl.ch>
*
*
* @brief Specialization of the material class for isotropic viscoplastic (small deformation)
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "material_viscoplastic.hh"
#include "solid_mechanics_model.hh"
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
template
<
UInt
dim
>
MaterialViscoPlastic
<
dim
>::
MaterialViscoPlastic
(
SolidMechanicsModel
&
model
,
const
ID
&
id
)
:
Material
(
model
,
id
),
MaterialPlastic
<
dim
>
(
model
,
id
)
{
AKANTU_DEBUG_IN
();
this
->
registerParam
(
"rate"
,
rate
,
0.
,
_pat_parsable
|
_pat_modifiable
,
"Rate sensitivity component"
);
this
->
registerParam
(
"edot0"
,
edot0
,
0.
,
_pat_parsable
|
_pat_modifiable
,
"Reference strain rate"
);
this
->
registerParam
(
"ts"
,
ts
,
0.
,
_pat_parsable
|
_pat_modifiable
,
"Time Step"
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
template
<
UInt
spatial_dimension
>
void
MaterialViscoPlastic
<
spatial_dimension
>::
computeStress
(
ElementType
el_type
,
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
Real
*
iso_hardening
=
this
->
iso_hardening
(
el_type
,
ghost_type
).
storage
();
Array
<
Real
>::
matrix_iterator
previous_grad_u_it
=
this
->
gradu
.
previous
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
previous_sigma_it
=
this
->
stress
.
previous
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
inelastic_strain_it
=
this
->
inelastic_strain
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
previous_inelastic_strain_it
=
this
->
inelastic_strain
.
previous
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_BEGIN
(
el_type
,
ghost_type
);
computeStressOnQuad
(
grad_u
,
*
previous_grad_u_it
,
sigma
,
*
previous_sigma_it
,
*
inelastic_strain_it
,
*
previous_inelastic_strain_it
,
*
iso_hardening
);
++
inelastic_strain_it
;
++
iso_hardening
;
++
previous_grad_u_it
;
MATERIAL_STRESS_QUADRATURE_POINT_LOOP_END
;
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
template
<
UInt
spatial_dimension
>
void
MaterialViscoPlastic
<
spatial_dimension
>::
computeTangentModuli
(
__attribute__
((
unused
))
const
ElementType
&
el_type
,
Array
<
Real
>
&
tangent_matrix
,
__attribute__
((
unused
))
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
Array
<
Real
>::
matrix_iterator
previous_sigma_it
=
this
->
stress
.
previous
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
previous_strain_it
=
this
->
gradu
.
previous
(
el_type
,
ghost_type
).
begin
(
spatial_dimension
,
spatial_dimension
);
Real
*
iso_hardening
=
this
->
iso_hardening
(
el_type
,
ghost_type
).
storage
();
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_BEGIN
(
tangent_matrix
);
Matrix
<
Real
>
&
previous_grad_u
=
*
previous_strain_it
;
Matrix
<
Real
>
&
previous_sigma_tensor
=
*
previous_sigma_it
;
computeTangentModuliOnQuad
(
tangent
,
grad_u
,
previous_grad_u
,
sigma_tensor
,
previous_sigma_tensor
,
*
iso_hardening
);
++
previous_sigma_it
;
++
previous_strain_it
;
++
iso_hardening
;
MATERIAL_TANGENT_QUADRATURE_POINT_LOOP_END
;
AKANTU_DEBUG_OUT
();
}
INSTANTIATE_MATERIAL
(
MaterialViscoPlastic
);
__END_AKANTU__
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