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rAKA akantu
test_ASR_damage.cc
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/**
* @file test_ASR_damage.cc
*
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
*
*
* @brief test the solidmechancis model for IGFEM analysis
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
*/
/* -------------------------------------------------------------------------- */
#include "solid_mechanics_model_igfem.hh"
#include "aka_common.hh"
// #include "mesh_segment_intersector.hh"
// #include "mesh_sphere_intersector.hh"
// #include "geom_helper_functions.hh"
// #include "mesh_geom_common.hh"
/* -------------------------------------------------------------------------- */
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <cmath>
#include <math.h>
#include "dumper_paraview.hh"
#include "mesh_geom_common.hh"
#include "material_damage_iterative.hh"
#include "material_igfem_saw_tooth_damage.hh"
//#include "dumpable_inline_impl.hh"
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
class
Sphere
{
public
:
Sphere
(
const
Vector
<
Real
>
&
center
,
Real
radius
,
Real
tolerance
=
0.
)
:
center
(
center
),
radius
(
radius
),
tolerance
(
tolerance
)
{
}
bool
isInside
(
const
Vector
<
Real
>
&
point
)
const
{
return
(
point
.
distance
(
center
)
<
radius
+
tolerance
);
}
const
Vector
<
Real
>
&
getCenter
()
const
{
return
center
;
}
Real
&
getRadius
()
{
return
radius
;
}
protected
:
Vector
<
Real
>
center
;
Real
radius
,
tolerance
;
};
void
growGel
(
std
::
list
<
SK
::
Sphere_3
>
&
query_list
,
Real
new_radius
)
{
std
::
list
<
SK
::
Sphere_3
>::
const_iterator
query_it
=
query_list
.
begin
(),
query_end
=
query_list
.
end
();
std
::
list
<
SK
::
Sphere_3
>
sphere_list
;
for
(;
query_it
!=
query_end
;
++
query_it
)
{
SK
::
Sphere_3
sphere
(
query_it
->
center
(),
new_radius
*
new_radius
);
sphere_list
.
push_back
(
sphere
);
}
query_list
.
clear
();
query_list
=
sphere_list
;
}
void
applyBoundaryConditions
(
SolidMechanicsModelIGFEM
&
model
)
{
/// boundary conditions
Mesh
&
mesh
=
model
.
getMesh
();
mesh
.
computeBoundingBox
();
const
Vector
<
Real
>
&
lowerBounds
=
mesh
.
getLowerBounds
();
const
Vector
<
Real
>
&
upperBounds
=
mesh
.
getUpperBounds
();
Real
bottom
=
lowerBounds
(
1
);
Real
top
=
upperBounds
(
1
);
Real
left
=
lowerBounds
(
0
);
// Real right = upperBounds(0);
Real
eps
=
std
::
abs
((
top
-
bottom
)
*
1e-12
);
const
Array
<
Real
>
&
pos
=
mesh
.
getNodes
();
Array
<
Real
>
&
disp
=
model
.
getDisplacement
();
Array
<
bool
>
&
boun
=
model
.
getBlockedDOFs
();
disp
.
clear
();
boun
.
clear
();
/// free expansion
for
(
UInt
i
=
0
;
i
<
mesh
.
getNbNodes
();
++
i
)
{
if
(
std
::
abs
(
pos
(
i
,
1
)
-
bottom
)
<
eps
){
boun
(
i
,
1
)
=
true
;
disp
(
i
,
1
)
=
0.0
;
}
if
(
std
::
abs
(
pos
(
i
,
0
)
-
left
)
<
eps
){
boun
(
i
,
0
)
=
true
;
disp
(
i
,
0
)
=
0.0
;
}
}
}
void
applyEigenstrain
(
SolidMechanicsModelIGFEM
&
model
)
{
/// apply eigenstrain
/// igfem elements
GhostType
ghost_type
=
_not_ghost
;
ElementType
element_type
=
_igfem_triangle_5
;
Array
<
Real
>
&
eigenstrain
=
const_cast
<
Array
<
Real
>
&>
(
model
.
getMaterial
(
"igfem_damage"
).
getInternal
<
Real
>
(
"eigen_grad_u"
)(
element_type
,
ghost_type
));
const
Array
<
UInt
>
&
is_inside
=
model
.
getMaterial
(
"igfem_damage"
).
getInternal
<
UInt
>
(
"sub_material"
)(
element_type
,
ghost_type
);
Vector
<
Real
>
prestrain
(
4
);
prestrain
.
clear
();
prestrain
(
0
)
=
0.07
;
prestrain
(
3
)
=
0.07
;
Array
<
Real
>::
vector_iterator
eig_it
=
eigenstrain
.
begin
(
4
);
Array
<
UInt
>::
const_scalar_iterator
sub_mat_it
=
is_inside
.
begin
();
Array
<
Real
>::
vector_iterator
eig_end
=
eigenstrain
.
end
(
4
);
for
(;
eig_it
!=
eig_end
;
++
eig_it
,
++
sub_mat_it
)
{
if
((
*
sub_mat_it
)
==
0
)
*
eig_it
=
prestrain
;
}
/// regular elements
element_type
=
_triangle_3
;
Array
<
Real
>
&
eigenstrain_reg
=
const_cast
<
Array
<
Real
>
&>
(
model
.
getMaterial
(
"gel"
).
getInternal
<
Real
>
(
"eigen_grad_u"
)(
element_type
,
ghost_type
));
eig_it
=
eigenstrain_reg
.
begin
(
4
);
eig_end
=
eigenstrain_reg
.
end
(
4
);
for
(;
eig_it
!=
eig_end
;
++
eig_it
,
++
sub_mat_it
)
{
*
eig_it
=
prestrain
;
}
}
class
SphereMaterialSelector
:
public
DefaultMaterialIGFEMSelector
{
public
:
SphereMaterialSelector
(
Real
radius
,
Vector
<
Real
>
&
center
,
SolidMechanicsModelIGFEM
&
model
,
Real
aggregate_radius
,
Real
tolerance
=
1.e-12
)
:
DefaultMaterialIGFEMSelector
(
model
),
model
(
model
),
aggregate
(
center
,
aggregate_radius
,
tolerance
)
{
gel_pockets
.
push_back
(
Sphere
(
center
,
radius
,
tolerance
));
}
UInt
operator
()(
const
Element
&
elem
)
{
if
(
Mesh
::
getKind
(
elem
.
type
)
==
_ek_igfem
)
return
3
;
// return 2;//2model.getMaterialIndex(2);
const
Mesh
&
mesh
=
model
.
getMesh
();
UInt
spatial_dimension
=
model
.
getSpatialDimension
();
Vector
<
Real
>
barycenter
(
spatial_dimension
);
mesh
.
getBarycenter
(
elem
,
barycenter
);
std
::
vector
<
Sphere
>::
const_iterator
iit
=
gel_pockets
.
begin
();
std
::
vector
<
Sphere
>::
const_iterator
eit
=
gel_pockets
.
end
();
for
(;
iit
!=
eit
;
++
iit
)
{
const
Sphere
&
sp
=
*
iit
;
if
(
sp
.
isInside
(
barycenter
))
{
return
2
;
//elastic gel material
//return 0; /// aggregate
}
}
if
(
aggregate
.
isInside
(
barycenter
))
return
0
;
///return 2;
return
1
;
}
void
update
(
Real
new_radius
)
{
std
::
vector
<
Sphere
>::
iterator
iit
=
gel_pockets
.
begin
();
std
::
vector
<
Sphere
>::
iterator
eit
=
gel_pockets
.
end
();
for
(;
iit
!=
eit
;
++
iit
)
{
Real
&
radius
=
iit
->
getRadius
();
radius
=
new_radius
;
}
}
protected
:
SolidMechanicsModelIGFEM
&
model
;
std
::
vector
<
Sphere
>
gel_pockets
;
Sphere
aggregate
;
};
typedef
Spherical
SK
;
int
main
(
int
argc
,
char
*
argv
[])
{
initialize
(
"material_ASR.dat"
,
argc
,
argv
);
/// problem dimension
const
UInt
spatial_dimension
=
2
;
/// mesh creation
Mesh
mesh
(
spatial_dimension
);
mesh
.
read
(
std
::
string
(
argv
[
1
]));
Math
::
setTolerance
(
1e-14
);
Real
aggregate_radius
=
0.016
;
/// geometry of inclusion
Real
radius_inclusion
=
0.0002
;
///0.0158;//0.0002;
// Spherical kernel testing the addition of nodes
SK
::
Sphere_3
sphere
(
SK
::
Point_3
(
0
,
0
,
0
),
radius_inclusion
*
radius_inclusion
);
std
::
list
<
SK
::
Sphere_3
>
sphere_list
;
sphere_list
.
push_back
(
sphere
);
ID
domain_name
=
"gel"
;
/// model creation
SolidMechanicsModelIGFEM
model
(
mesh
);
SphereMaterialSelector
*
mat_selector
;
Vector
<
Real
>
c_sphere
(
spatial_dimension
);
c_sphere
.
clear
();
mat_selector
=
new
SphereMaterialSelector
(
0.
,
c_sphere
,
model
,
aggregate_radius
);
model
.
setMaterialSelector
(
*
mat_selector
);
model
.
initFull
();
/// register the sphere list in the model
/// add fields that should be dumped
model
.
setBaseName
(
"regular_elements"
);
model
.
addDumpField
(
"material_index"
);
model
.
addDumpFieldVector
(
"displacement"
);
model
.
addDumpField
(
"blocked_dofs"
);
model
.
addDumpField
(
"stress"
);
model
.
addDumpField
(
"damage"
);
model
.
addDumpField
(
"Sc"
);
model
.
addDumpField
(
"eigen_grad_u"
);
// model.dump();
model
.
registerGeometryObject
(
sphere_list
,
domain_name
);
mat_selector
->
update
(
radius_inclusion
);
model
.
update
(
domain_name
);
applyBoundaryConditions
(
model
);
applyEigenstrain
(
model
);
model
.
setBaseNameToDumper
(
"igfem elements"
,
"igfem elements"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"lambda"
);
model
.
addDumpFieldVectorToDumper
(
"igfem elements"
,
"real_displacement"
);
model
.
addDumpFieldVectorToDumper
(
"igfem elements"
,
"displacement"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"material_index"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"stress"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"Sc"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"damage"
);
model
.
addDumpFieldToDumper
(
"igfem elements"
,
"eigen_grad_u"
);
/// Instantiate objects of class MyDamageso
MaterialDamageIterative
<
spatial_dimension
>
&
mat_paste
=
dynamic_cast
<
MaterialDamageIterative
<
spatial_dimension
>
&
>
(
model
.
getMaterial
(
1
));
MaterialDamageIterative
<
spatial_dimension
>
&
mat_aggregate
=
dynamic_cast
<
MaterialDamageIterative
<
spatial_dimension
>
&
>
(
model
.
getMaterial
(
0
));
MaterialIGFEMSawToothDamage
<
spatial_dimension
>
&
mat_igfem
=
dynamic_cast
<
MaterialIGFEMSawToothDamage
<
spatial_dimension
>
&
>
(
model
.
getMaterial
(
3
));
bool
factorize
=
false
;
bool
converged
=
false
;
Real
error
;
UInt
nb_damaged_elements
=
0
;
Real
max_eq_stress_aggregate
=
0
;
Real
max_eq_stress_paste
=
0
;
Real
max_igfem
=
0
;
do
{
converged
=
model
.
solveStep
<
_scm_newton_raphson_tangent
,
_scc_increment
>
(
1e-4
,
error
,
2
,
factorize
);
/// compute damage
max_eq_stress_aggregate
=
mat_aggregate
.
getNormMaxEquivalentStress
();
max_eq_stress_paste
=
mat_paste
.
getNormMaxEquivalentStress
();
max_igfem
=
mat_igfem
.
getNormMaxEquivalentStress
();
if
(
max_eq_stress_aggregate
>
max_eq_stress_paste
)
if
(
max_eq_stress_aggregate
>
max_igfem
)
nb_damaged_elements
=
mat_aggregate
.
updateDamage
();
else
nb_damaged_elements
=
mat_igfem
.
updateDamage
();
else
if
(
max_eq_stress_paste
>
max_igfem
)
nb_damaged_elements
=
mat_paste
.
updateDamage
();
else
nb_damaged_elements
=
mat_igfem
.
updateDamage
();
}
while
(
nb_damaged_elements
);
model
.
dump
();
model
.
dump
(
"igfem elements"
);
/// grow the gel i = 12
for
(
UInt
i
=
1
;
i
<
12
;
++
i
)
{
// Real new_radius = radius_inclusion - i * 0.00015;
Real
new_radius
=
radius_inclusion
+
i
*
0.00015
;
growGel
(
sphere_list
,
new_radius
);
mat_selector
->
update
(
new_radius
);
model
.
update
(
domain_name
);
applyBoundaryConditions
(
model
);
applyEigenstrain
(
model
);
factorize
=
false
;
converged
=
false
;
nb_damaged_elements
=
0
;
do
{
converged
=
model
.
solveStep
<
_scm_newton_raphson_tangent
,
_scc_increment
>
(
1e-4
,
error
,
2
,
factorize
);
/// compute damage
max_eq_stress_aggregate
=
mat_aggregate
.
getNormMaxEquivalentStress
();
max_eq_stress_paste
=
mat_paste
.
getNormMaxEquivalentStress
();
max_igfem
=
mat_igfem
.
getNormMaxEquivalentStress
();
if
(
max_eq_stress_aggregate
>
max_eq_stress_paste
)
if
(
max_eq_stress_aggregate
>
max_igfem
)
nb_damaged_elements
=
mat_aggregate
.
updateDamage
();
else
nb_damaged_elements
=
mat_igfem
.
updateDamage
();
else
if
(
max_eq_stress_paste
>
max_igfem
)
nb_damaged_elements
=
mat_paste
.
updateDamage
();
else
nb_damaged_elements
=
mat_igfem
.
updateDamage
();
// if (max_eq_stress_aggregate > max_eq_stress_paste)
// nb_damaged_elements = mat_aggregate.updateDamage();
// else
// nb_damaged_elements = mat_paste.updateDamage();
}
while
(
nb_damaged_elements
);
model
.
dump
();
model
.
dump
(
"igfem elements"
);
std
::
cout
<<
"the step is "
<<
i
<<
std
::
endl
;
}
model
.
dump
(
"igfem elements"
);
model
.
dump
();
// // Math::setTolerance(1e-14);
// // ///dumper_igfem.dump();
// // Array<UInt> & connectivity_igfem = const_cast<Array<UInt> &>(mesh.getConnectivity(_igfem_triangle_5));
// growGel(sphere_list, 0.72);
// mat_selector->update(0.72);
// model.update(domain_name);
// inner_radius = 0.72;
// applyBoundaryConditions(model,inner_radius);
// factorize = false;
// converged = false;
// model.dump("igfem elements");
// model.dump();
// converged = model.solveStep<_scm_newton_raphson_tangent, _scc_increment>(1e-4, error, 2, factorize);
// model.dump("igfem elements");
// model.dump();
finalize
();
return
EXIT_SUCCESS
;
}
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