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material_orthotropic_damage_iterative_inline_impl.hh
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Created
Tue, Aug 27, 22:16
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2 KB
Mime Type
text/x-c++
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Thu, Aug 29, 22:16 (2 d)
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Handle
20212944
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rAKA akantu
material_orthotropic_damage_iterative_inline_impl.hh
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/**
* @file material_damage_iterative_inline_impl.hh
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
* @date Sun Mar 8 12:54:30 2015
*
* @brief Implementation of inline functions of the material damage iterative
*
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
template
<
Int
spatial_dimension
>
inline
void
MaterialOrthotropicDamageIterative
<
spatial_dimension
>::
computeDamageAndStressOnQuad
(
Matrix
<
Real
>
&
sigma
,
Matrix
<
Real
>
&
one_minus_D
,
Matrix
<
Real
>
&
sqrt_one_minus_D
,
Matrix
<
Real
>
&
damage
,
Matrix
<
Real
>
&
first_term
,
Matrix
<
Real
>
&
third_term
)
{
// Real dmax = *(std::max_element(damage.storage(), damage.storage() +
// spatial_dimension*spatial_dimension) );
Real
eta_effective
=
0
;
// if ( (1 - dmax*dmax) < (1 - this->eta / spatial_dimension *
// damage.trace()) ) {
// eta_effective = this->spatial_dimension * dmax * dmax / damage.trace();
// }
// else
eta_effective
=
this
->
eta
;
/// hydrostatic sensitivity parameter
// Real eta = 3.;
/// Definition of Cauchy stress based on second order damage tensor:
/// "Anisotropic damage modelling of biaxial behaviour and rupture
/// of concrete strucutres", Ragueneau et al., 2008, Eq. 7
first_term
.
mul
<
false
,
false
>
(
sqrt_one_minus_D
,
sigma
);
first_term
*=
sqrt_one_minus_D
;
Real
second_term
=
0
;
for
(
UInt
i
=
0
;
i
<
this
->
spatial_dimension
;
++
i
)
{
for
(
UInt
j
=
0
;
j
<
this
->
spatial_dimension
;
++
j
)
second_term
+=
sigma
(
i
,
j
)
*
one_minus_D
(
i
,
j
);
}
second_term
/=
(
this
->
spatial_dimension
-
damage
.
trace
());
// for (UInt i = 0; i < this->spatial_dimension; ++i) {
// for (UInt j = 0; j < this->spatial_dimension; ++j)
// one_minus_D(i,j) *= second_term;
// }
one_minus_D
*=
second_term
;
third_term
.
eye
(
1.
/
this
->
spatial_dimension
*
sigma
.
trace
()
*
(
1
-
std
::
min
(
eta_effective
/
(
this
->
spatial_dimension
)
*
damage
.
trace
(),
this
->
max_damage
)));
sigma
.
copy
(
first_term
);
sigma
-=
one_minus_D
;
sigma
+=
third_term
;
}
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