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rAKA akantu
material_cohesive.cc
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/**
* @file material_cohesive.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @author Seyedeh Mohadeseh Taheri Mousavi <mohadeseh.taherimousavi@epfl.ch>
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
* @date creation: Wed Feb 22 2012
* @date last modification: Tue Jan 12 2016
*
* @brief Specialization of the material class for cohesive elements
*
* @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 "material_cohesive.hh"
#include "solid_mechanics_model_cohesive.hh"
#include "sparse_matrix.hh"
#include "dof_synchronizer.hh"
#include "aka_random_generator.hh"
#include "shape_cohesive.hh"
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
MaterialCohesive
::
MaterialCohesive
(
SolidMechanicsModel
&
model
,
const
ID
&
id
)
:
Material
(
model
,
id
),
facet_filter
(
"facet_filter"
,
id
,
this
->
getMemoryID
()),
fem_cohesive
(
&
(
model
.
getFEEngineClass
<
MyFEEngineCohesiveType
>
(
"CohesiveFEEngine"
))),
reversible_energy
(
"reversible_energy"
,
*
this
),
total_energy
(
"total_energy"
,
*
this
),
opening
(
"opening"
,
*
this
),
opening_old
(
"opening (old)"
,
*
this
),
tractions
(
"tractions"
,
*
this
),
tractions_old
(
"tractions (old)"
,
*
this
),
contact_tractions
(
"contact_tractions"
,
*
this
),
contact_opening
(
"contact_opening"
,
*
this
),
delta_max
(
"delta max"
,
*
this
),
use_previous_delta_max
(
false
),
use_previous_opening
(
false
),
damage
(
"damage"
,
*
this
),
sigma_c
(
"sigma_c"
,
*
this
),
normal
(
0
,
spatial_dimension
,
"normal"
)
{
AKANTU_DEBUG_IN
();
this
->
model
=
dynamic_cast
<
SolidMechanicsModelCohesive
*>
(
&
model
);
this
->
registerParam
(
"sigma_c"
,
sigma_c
,
_pat_parsable
|
_pat_readable
,
"Critical stress"
);
this
->
registerParam
(
"delta_c"
,
delta_c
,
Real
(
0.
),
_pat_parsable
|
_pat_readable
,
"Critical displacement"
);
this
->
model
->
getMesh
().
initElementTypeMapArray
(
this
->
element_filter
,
1
,
spatial_dimension
,
false
,
_ek_cohesive
);
if
(
this
->
model
->
getIsExtrinsic
())
this
->
model
->
getMeshFacets
().
initElementTypeMapArray
(
facet_filter
,
1
,
spatial_dimension
-
1
);
this
->
reversible_energy
.
initialize
(
1
);
this
->
total_energy
.
initialize
(
1
);
this
->
tractions_old
.
initialize
(
spatial_dimension
);
this
->
tractions
.
initialize
(
spatial_dimension
);
this
->
opening_old
.
initialize
(
spatial_dimension
);
this
->
contact_tractions
.
initialize
(
spatial_dimension
);
this
->
contact_opening
.
initialize
(
spatial_dimension
);
this
->
opening
.
initialize
(
spatial_dimension
);
this
->
delta_max
.
initialize
(
1
);
this
->
damage
.
initialize
(
1
);
if
(
this
->
model
->
getIsExtrinsic
())
this
->
sigma_c
.
initialize
(
1
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
MaterialCohesive
::~
MaterialCohesive
()
{
AKANTU_DEBUG_IN
();
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
initMaterial
()
{
AKANTU_DEBUG_IN
();
Material
::
initMaterial
();
if
(
this
->
use_previous_delta_max
)
this
->
delta_max
.
initializeHistory
();
if
(
this
->
use_previous_opening
)
this
->
opening
.
initializeHistory
();
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
assembleResidual
(
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
#if defined(AKANTU_DEBUG_TOOLS)
debug
::
element_manager
.
printData
(
debug
::
_dm_material_cohesive
,
"Cohesive Tractions"
,
tractions
);
#endif
Array
<
Real
>
&
residual
=
const_cast
<
Array
<
Real
>
&>
(
model
->
getResidual
());
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
Array
<
UInt
>
&
elem_filter
=
element_filter
(
*
it
,
ghost_type
);
UInt
nb_element
=
elem_filter
.
getSize
();
if
(
nb_element
==
0
)
continue
;
const
Array
<
Real
>
&
shapes
=
fem_cohesive
->
getShapes
(
*
it
,
ghost_type
);
Array
<
Real
>
&
traction
=
tractions
(
*
it
,
ghost_type
);
Array
<
Real
>
&
contact_traction
=
contact_tractions
(
*
it
,
ghost_type
);
UInt
size_of_shapes
=
shapes
.
getNbComponent
();
UInt
nb_nodes_per_element
=
Mesh
::
getNbNodesPerElement
(
*
it
);
UInt
nb_quadrature_points
=
fem_cohesive
->
getNbIntegrationPoints
(
*
it
,
ghost_type
);
/// compute @f$t_i N_a@f$
Array
<
Real
>
*
traction_cpy
=
new
Array
<
Real
>
(
nb_element
*
nb_quadrature_points
,
spatial_dimension
*
size_of_shapes
);
Array
<
Real
>::
iterator
<
Matrix
<
Real
>
>
traction_it
=
traction
.
begin
(
spatial_dimension
,
1
);
Array
<
Real
>::
iterator
<
Matrix
<
Real
>
>
contact_traction_it
=
contact_traction
.
begin
(
spatial_dimension
,
1
);
Array
<
Real
>::
const_iterator
<
Matrix
<
Real
>
>
shapes_filtered_begin
=
shapes
.
begin
(
1
,
size_of_shapes
);
Array
<
Real
>::
iterator
<
Matrix
<
Real
>
>
traction_cpy_it
=
traction_cpy
->
begin
(
spatial_dimension
,
size_of_shapes
);
Matrix
<
Real
>
traction_tmp
(
spatial_dimension
,
1
);
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
UInt
current_quad
=
elem_filter
(
el
)
*
nb_quadrature_points
;
for
(
UInt
q
=
0
;
q
<
nb_quadrature_points
;
++
q
,
++
traction_it
,
++
contact_traction_it
,
++
current_quad
,
++
traction_cpy_it
)
{
const
Matrix
<
Real
>
&
shapes_filtered
=
shapes_filtered_begin
[
current_quad
];
traction_tmp
.
copy
(
*
traction_it
);
traction_tmp
+=
*
contact_traction_it
;
traction_cpy_it
->
mul
<
false
,
false
>
(
traction_tmp
,
shapes_filtered
);
}
}
/**
* compute @f$\int t \cdot N\, dS@f$ by @f$ \sum_q \mathbf{N}^t
* \mathbf{t}_q \overline w_q J_q@f$
*/
Array
<
Real
>
*
int_t_N
=
new
Array
<
Real
>
(
nb_element
,
spatial_dimension
*
size_of_shapes
,
"int_t_N"
);
fem_cohesive
->
integrate
(
*
traction_cpy
,
*
int_t_N
,
spatial_dimension
*
size_of_shapes
,
*
it
,
ghost_type
,
elem_filter
);
delete
traction_cpy
;
int_t_N
->
extendComponentsInterlaced
(
2
,
int_t_N
->
getNbComponent
());
Real
*
int_t_N_val
=
int_t_N
->
storage
();
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
for
(
UInt
n
=
0
;
n
<
size_of_shapes
*
spatial_dimension
;
++
n
)
int_t_N_val
[
n
]
*=
-
1.
;
int_t_N_val
+=
nb_nodes_per_element
*
spatial_dimension
;
}
/// assemble
model
->
getFEEngineBoundary
().
assembleArray
(
*
int_t_N
,
residual
,
model
->
getDOFSynchronizer
().
getLocalDOFEquationNumbers
(),
residual
.
getNbComponent
(),
*
it
,
ghost_type
,
elem_filter
,
1
);
delete
int_t_N
;
}
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
assembleStiffnessMatrix
(
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
SparseMatrix
&
K
=
const_cast
<
SparseMatrix
&>
(
model
->
getStiffnessMatrix
());
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
UInt
nb_quadrature_points
=
fem_cohesive
->
getNbIntegrationPoints
(
*
it
,
ghost_type
);
UInt
nb_nodes_per_element
=
Mesh
::
getNbNodesPerElement
(
*
it
);
const
Array
<
Real
>
&
shapes
=
fem_cohesive
->
getShapes
(
*
it
,
ghost_type
);
Array
<
UInt
>
&
elem_filter
=
element_filter
(
*
it
,
ghost_type
);
UInt
nb_element
=
elem_filter
.
getSize
();
if
(
!
nb_element
)
continue
;
UInt
size_of_shapes
=
shapes
.
getNbComponent
();
Array
<
Real
>
*
shapes_filtered
=
new
Array
<
Real
>
(
nb_element
*
nb_quadrature_points
,
size_of_shapes
,
"filtered shapes"
);
Real
*
shapes_val
=
shapes
.
storage
();
Real
*
shapes_filtered_val
=
shapes_filtered
->
storage
();
UInt
*
elem_filter_val
=
elem_filter
.
storage
();
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
shapes_val
=
shapes
.
storage
()
+
elem_filter_val
[
el
]
*
size_of_shapes
*
nb_quadrature_points
;
memcpy
(
shapes_filtered_val
,
shapes_val
,
size_of_shapes
*
nb_quadrature_points
*
sizeof
(
Real
));
shapes_filtered_val
+=
size_of_shapes
*
nb_quadrature_points
;
}
/**
* compute A matrix @f$ \mathbf{A} = \left[\begin{array}{c c c c c c c c c c c c}
* 1 & 0 & 0 & 0 & 0 & 0 & -1 & 0 & 0 & 0 & 0 & 0 \\
* 0 & 1 & 0 & 0 & 0 & 0 & 0 & -1 & 0 & 0 & 0 & 0 \\
* 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & -1 & 0 & 0 & 0 \\
* 0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & -1 & 0 & 0 \\
* 0 & 0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & -1 & 0 \\
* 0 & 0 & 0 & 0 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & -1
* \end{array} \right]@f$
**/
// UInt size_of_A = spatial_dimension*size_of_shapes*spatial_dimension*nb_nodes_per_element;
// Real * A = new Real[size_of_A];
// memset(A, 0, size_of_A*sizeof(Real));
Matrix
<
Real
>
A
(
spatial_dimension
*
size_of_shapes
,
spatial_dimension
*
nb_nodes_per_element
);
for
(
UInt
i
=
0
;
i
<
spatial_dimension
*
size_of_shapes
;
++
i
)
{
A
(
i
,
i
)
=
1
;
A
(
i
,
i
+
spatial_dimension
*
size_of_shapes
)
=
-
1
;
}
/// compute traction. This call is not necessary for the linear
/// cohesive law that, currently, is the only one used for the
/// extrinsic approach.
if
(
!
model
->
getIsExtrinsic
()){
computeTraction
(
ghost_type
);
}
/// get the tangent matrix @f$\frac{\partial{(t/\delta)}}{\partial{\delta}} @f$
Array
<
Real
>
*
tangent_stiffness_matrix
=
new
Array
<
Real
>
(
nb_element
*
nb_quadrature_points
,
spatial_dimension
*
spatial_dimension
,
"tangent_stiffness_matrix"
);
// Array<Real> * normal = new Array<Real>(nb_element * nb_quadrature_points, spatial_dimension, "normal");
normal
.
resize
(
nb_quadrature_points
);
computeNormal
(
model
->
getCurrentPosition
(),
normal
,
*
it
,
ghost_type
);
/// compute openings @f$\mathbf{\delta}@f$
//computeOpening(model->getDisplacement(), opening(*it, ghost_type), *it, ghost_type);
tangent_stiffness_matrix
->
clear
();
computeTangentTraction
(
*
it
,
*
tangent_stiffness_matrix
,
normal
,
ghost_type
);
// delete normal;
UInt
size_at_nt_d_n_a
=
spatial_dimension
*
nb_nodes_per_element
*
spatial_dimension
*
nb_nodes_per_element
;
Array
<
Real
>
*
at_nt_d_n_a
=
new
Array
<
Real
>
(
nb_element
*
nb_quadrature_points
,
size_at_nt_d_n_a
,
"A^t*N^t*D*N*A"
);
Array
<
Real
>::
iterator
<
Vector
<
Real
>
>
shapes_filt_it
=
shapes_filtered
->
begin
(
size_of_shapes
);
Array
<
Real
>::
matrix_iterator
D_it
=
tangent_stiffness_matrix
->
begin
(
spatial_dimension
,
spatial_dimension
);
Array
<
Real
>::
matrix_iterator
At_Nt_D_N_A_it
=
at_nt_d_n_a
->
begin
(
spatial_dimension
*
nb_nodes_per_element
,
spatial_dimension
*
nb_nodes_per_element
);
Array
<
Real
>::
matrix_iterator
At_Nt_D_N_A_end
=
at_nt_d_n_a
->
end
(
spatial_dimension
*
nb_nodes_per_element
,
spatial_dimension
*
nb_nodes_per_element
);
Matrix
<
Real
>
N
(
spatial_dimension
,
spatial_dimension
*
size_of_shapes
);
Matrix
<
Real
>
N_A
(
spatial_dimension
,
spatial_dimension
*
nb_nodes_per_element
);
Matrix
<
Real
>
D_N_A
(
spatial_dimension
,
spatial_dimension
*
nb_nodes_per_element
);
for
(;
At_Nt_D_N_A_it
!=
At_Nt_D_N_A_end
;
++
At_Nt_D_N_A_it
,
++
D_it
,
++
shapes_filt_it
)
{
N
.
clear
();
/**
* store the shapes in voigt notations matrix @f$\mathbf{N} =
* \begin{array}{cccccc} N_0(\xi) & 0 & N_1(\xi) &0 & N_2(\xi) & 0 \\
* 0 & * N_0(\xi)& 0 &N_1(\xi)& 0 & N_2(\xi) \end{array} @f$
**/
for
(
UInt
i
=
0
;
i
<
spatial_dimension
;
++
i
)
for
(
UInt
n
=
0
;
n
<
size_of_shapes
;
++
n
)
N
(
i
,
i
+
spatial_dimension
*
n
)
=
(
*
shapes_filt_it
)(
n
);
/**
* compute stiffness matrix @f$ \mathbf{K} = \delta \mathbf{U}^T
* \int_{\Gamma_c} {\mathbf{P}^t \frac{\partial{\mathbf{t}}} {\partial{\delta}}
* \mathbf{P} d\Gamma \Delta \mathbf{U}} @f$
**/
N_A
.
mul
<
false
,
false
>
(
N
,
A
);
D_N_A
.
mul
<
false
,
false
>
(
*
D_it
,
N_A
);
(
*
At_Nt_D_N_A_it
).
mul
<
true
,
false
>
(
D_N_A
,
N_A
);
}
delete
tangent_stiffness_matrix
;
delete
shapes_filtered
;
Array
<
Real
>
*
K_e
=
new
Array
<
Real
>
(
nb_element
,
size_at_nt_d_n_a
,
"K_e"
);
fem_cohesive
->
integrate
(
*
at_nt_d_n_a
,
*
K_e
,
size_at_nt_d_n_a
,
*
it
,
ghost_type
,
elem_filter
);
delete
at_nt_d_n_a
;
model
->
getFEEngine
().
assembleMatrix
(
*
K_e
,
K
,
spatial_dimension
,
*
it
,
ghost_type
,
elem_filter
);
delete
K_e
;
}
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- *
* Compute traction from displacements
*
* @param[in] ghost_type compute the residual for _ghost or _not_ghost element
*/
void
MaterialCohesive
::
computeTraction
(
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
#if defined(AKANTU_DEBUG_TOOLS)
debug
::
element_manager
.
printData
(
debug
::
_dm_material_cohesive
,
"Cohesive Openings"
,
opening
);
#endif
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
ghost_type
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
Array
<
UInt
>
&
elem_filter
=
element_filter
(
*
it
,
ghost_type
);
UInt
nb_element
=
elem_filter
.
getSize
();
if
(
nb_element
==
0
)
continue
;
UInt
nb_quadrature_points
=
nb_element
*
fem_cohesive
->
getNbIntegrationPoints
(
*
it
,
ghost_type
);
normal
.
resize
(
nb_quadrature_points
);
/// compute normals @f$\mathbf{n}@f$
computeNormal
(
model
->
getCurrentPosition
(),
normal
,
*
it
,
ghost_type
);
/// compute openings @f$\mathbf{\delta}@f$
computeOpening
(
model
->
getDisplacement
(),
opening
(
*
it
,
ghost_type
),
*
it
,
ghost_type
);
/// compute traction @f$\mathbf{t}@f$
computeTraction
(
normal
,
*
it
,
ghost_type
);
}
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
computeNormal
(
const
Array
<
Real
>
&
position
,
Array
<
Real
>
&
normal
,
ElementType
type
,
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
if
(
type
==
_cohesive_1d_2
)
fem_cohesive
->
computeNormalsOnIntegrationPoints
(
position
,
normal
,
type
,
ghost_type
);
else
{
#define COMPUTE_NORMAL(type) \
fem_cohesive->getShapeFunctions(). \
computeNormalsOnIntegrationPoints<type, CohesiveReduceFunctionMean>(position, \
normal, \
ghost_type, \
element_filter(type, ghost_type));
AKANTU_BOOST_COHESIVE_ELEMENT_SWITCH
(
COMPUTE_NORMAL
);
#undef COMPUTE_NORMAL
}
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
computeOpening
(
const
Array
<
Real
>
&
displacement
,
Array
<
Real
>
&
opening
,
ElementType
type
,
GhostType
ghost_type
)
{
AKANTU_DEBUG_IN
();
#define COMPUTE_OPENING(type) \
fem_cohesive->getShapeFunctions(). \
interpolateOnIntegrationPoints<type, CohesiveReduceFunctionOpening>(displacement, \
opening, \
spatial_dimension, \
ghost_type, \
element_filter(type, ghost_type));
AKANTU_BOOST_COHESIVE_ELEMENT_SWITCH
(
COMPUTE_OPENING
);
#undef COMPUTE_OPENING
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
MaterialCohesive
::
computeEnergies
()
{
AKANTU_DEBUG_IN
();
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
Real
*
memory_space
=
new
Real
[
2
*
spatial_dimension
];
Vector
<
Real
>
b
(
memory_space
,
spatial_dimension
);
Vector
<
Real
>
h
(
memory_space
+
spatial_dimension
,
spatial_dimension
);
for
(;
it
!=
last_type
;
++
it
)
{
Array
<
Real
>::
iterator
<
Real
>
erev
=
reversible_energy
(
*
it
,
_not_ghost
).
begin
();
Array
<
Real
>::
iterator
<
Real
>
etot
=
total_energy
(
*
it
,
_not_ghost
).
begin
();
Array
<
Real
>::
vector_iterator
traction_it
=
tractions
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
Array
<
Real
>::
vector_iterator
traction_old_it
=
tractions_old
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
Array
<
Real
>::
vector_iterator
opening_it
=
opening
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
Array
<
Real
>::
vector_iterator
opening_old_it
=
opening_old
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
Array
<
Real
>::
vector_iterator
traction_end
=
tractions
(
*
it
,
_not_ghost
).
end
(
spatial_dimension
);
/// loop on each quadrature point
for
(;
traction_it
!=
traction_end
;
++
traction_it
,
++
traction_old_it
,
++
opening_it
,
++
opening_old_it
,
++
erev
,
++
etot
)
{
/// trapezoidal integration
b
=
*
opening_it
;
b
-=
*
opening_old_it
;
h
=
*
traction_old_it
;
h
+=
*
traction_it
;
*
etot
+=
.5
*
b
.
dot
(
h
);
*
erev
=
.5
*
traction_it
->
dot
(
*
opening_it
);
}
}
delete
[]
memory_space
;
/// update old values
it
=
mesh
.
firstType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
GhostType
ghost_type
=
_not_ghost
;
for
(;
it
!=
last_type
;
++
it
)
{
tractions_old
(
*
it
,
ghost_type
).
copy
(
tractions
(
*
it
,
ghost_type
));
opening_old
(
*
it
,
ghost_type
).
copy
(
opening
(
*
it
,
ghost_type
));
}
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
Real
MaterialCohesive
::
getReversibleEnergy
()
{
AKANTU_DEBUG_IN
();
Real
erev
=
0.
;
/// integrate reversible energy for each type of elements
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
erev
+=
fem_cohesive
->
integrate
(
reversible_energy
(
*
it
,
_not_ghost
),
*
it
,
_not_ghost
,
element_filter
(
*
it
,
_not_ghost
));
}
AKANTU_DEBUG_OUT
();
return
erev
;
}
/* -------------------------------------------------------------------------- */
Real
MaterialCohesive
::
getDissipatedEnergy
()
{
AKANTU_DEBUG_IN
();
Real
edis
=
0.
;
/// integrate dissipated energy for each type of elements
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
Array
<
Real
>
dissipated_energy
(
total_energy
(
*
it
,
_not_ghost
));
dissipated_energy
-=
reversible_energy
(
*
it
,
_not_ghost
);
edis
+=
fem_cohesive
->
integrate
(
dissipated_energy
,
*
it
,
_not_ghost
,
element_filter
(
*
it
,
_not_ghost
));
}
AKANTU_DEBUG_OUT
();
return
edis
;
}
/* -------------------------------------------------------------------------- */
Real
MaterialCohesive
::
getContactEnergy
()
{
AKANTU_DEBUG_IN
();
Real
econ
=
0.
;
/// integrate contact energy for each type of elements
Mesh
&
mesh
=
fem_cohesive
->
getMesh
();
Mesh
::
type_iterator
it
=
mesh
.
firstType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
Mesh
::
type_iterator
last_type
=
mesh
.
lastType
(
spatial_dimension
,
_not_ghost
,
_ek_cohesive
);
for
(;
it
!=
last_type
;
++
it
)
{
Array
<
UInt
>
&
el_filter
=
element_filter
(
*
it
,
_not_ghost
);
UInt
nb_quad_per_el
=
fem_cohesive
->
getNbIntegrationPoints
(
*
it
,
_not_ghost
);
UInt
nb_quad_points
=
el_filter
.
getSize
()
*
nb_quad_per_el
;
Array
<
Real
>
contact_energy
(
nb_quad_points
);
Array
<
Real
>::
vector_iterator
contact_traction_it
=
contact_tractions
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
Array
<
Real
>::
vector_iterator
contact_opening_it
=
contact_opening
(
*
it
,
_not_ghost
).
begin
(
spatial_dimension
);
/// loop on each quadrature point
for
(
UInt
el
=
0
;
el
<
nb_quad_points
;
++
contact_traction_it
,
++
contact_opening_it
,
++
el
)
{
contact_energy
(
el
)
=
.5
*
contact_traction_it
->
dot
(
*
contact_opening_it
);
}
econ
+=
fem_cohesive
->
integrate
(
contact_energy
,
*
it
,
_not_ghost
,
el_filter
);
}
AKANTU_DEBUG_OUT
();
return
econ
;
}
/* -------------------------------------------------------------------------- */
Real
MaterialCohesive
::
getEnergy
(
std
::
string
type
)
{
AKANTU_DEBUG_IN
();
if
(
type
==
"reversible"
)
return
getReversibleEnergy
();
else
if
(
type
==
"dissipated"
)
return
getDissipatedEnergy
();
else
if
(
type
==
"cohesive contact"
)
return
getContactEnergy
();
AKANTU_DEBUG_OUT
();
return
0.
;
}
/* -------------------------------------------------------------------------- */
__END_AKANTU__
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