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test_cohesive_parallel_extrinsic_tetrahedron_displacement.cc
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Sat, Oct 19, 09:45
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rAKA akantu
test_cohesive_parallel_extrinsic_tetrahedron_displacement.cc
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/**
* @file test_cohesive_parallel_extrinsic_tetrahedron_displacement.cc
*
* @author Marco Vocialta <marco.vocialta@epfl.ch>
*
*
* @brief Displacement test for 3D cohesive elements
*
* @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_cohesive.hh"
#include "dumper_paraview.hh"
#include "material_cohesive_linear.hh"
#ifdef AKANTU_USE_IOHELPER
# include "dumper_paraview.hh"
#endif
/* -------------------------------------------------------------------------- */
using
namespace
akantu
;
bool
checkDisplacement
(
SolidMechanicsModelCohesive
&
model
,
ElementType
type
,
std
::
ofstream
&
error_output
,
UInt
step
,
bool
barycenters
);
int
main
(
int
argc
,
char
*
argv
[])
{
initialize
(
"material.dat"
,
argc
,
argv
);
debug
::
setDebugLevel
(
dblWarning
);
const
UInt
max_steps
=
500
;
Math
::
setTolerance
(
1.e-12
);
UInt
spatial_dimension
=
3
;
ElementType
type
=
_tetrahedron_10
;
Mesh
mesh
(
spatial_dimension
);
StaticCommunicator
&
comm
=
StaticCommunicator
::
getStaticCommunicator
();
Int
psize
=
comm
.
getNbProc
();
Int
prank
=
comm
.
whoAmI
();
akantu
::
MeshPartition
*
partition
=
NULL
;
if
(
prank
==
0
)
{
// Read the mesh
mesh
.
read
(
"tetrahedron.msh"
);
/// partition the mesh
partition
=
new
MeshPartitionScotch
(
mesh
,
spatial_dimension
);
// debug::setDebugLevel(dblDump);
partition
->
partitionate
(
psize
);
// debug::setDebugLevel(dblWarning);
}
SolidMechanicsModelCohesive
model
(
mesh
);
model
.
initParallel
(
partition
,
NULL
,
true
);
// debug::setDebugLevel(dblDump);
// std::cout << mesh << std::endl;
// debug::setDebugLevel(dblWarning);
model
.
initFull
(
SolidMechanicsModelCohesiveOptions
(
_explicit_lumped_mass
,
true
));
/* ------------------------------------------------------------------------ */
/* Facet part */
/* ------------------------------------------------------------------------ */
// Array<Real> limits(spatial_dimension, 2);
// limits(0, 0) = -0.01;
// limits(0, 1) = 0.01;
// limits(1, 0) = -100;
// limits(1, 1) = 100;
// limits(2, 0) = -100;
// limits(2, 1) = 100;
// model.enableFacetsCheckOnArea(limits);
/* ------------------------------------------------------------------------ */
/* End of facet part */
/* ------------------------------------------------------------------------ */
// debug::setDebugLevel(dblDump);
// std::cout << mesh_facets << std::endl;
// debug::setDebugLevel(dblWarning);
Real
time_step
=
model
.
getStableTimeStep
()
*
0.1
;
model
.
setTimeStep
(
time_step
);
std
::
cout
<<
"Time step: "
<<
time_step
<<
std
::
endl
;
model
.
assembleMassLumped
();
Array
<
Real
>
&
position
=
mesh
.
getNodes
();
Array
<
Real
>
&
velocity
=
model
.
getVelocity
();
Array
<
bool
>
&
boundary
=
model
.
getBlockedDOFs
();
Array
<
Real
>
&
displacement
=
model
.
getDisplacement
();
// const Array<Real> & residual = model.getResidual();
UInt
nb_nodes
=
mesh
.
getNbNodes
();
/// boundary conditions
for
(
UInt
n
=
0
;
n
<
nb_nodes
;
++
n
)
{
if
(
position
(
n
,
0
)
>
0.99
||
position
(
n
,
0
)
<
-
0.99
)
{
for
(
UInt
dim
=
0
;
dim
<
spatial_dimension
;
++
dim
)
{
boundary
(
n
,
dim
)
=
true
;
}
}
if
(
position
(
n
,
0
)
>
0.99
||
position
(
n
,
0
)
<
-
0.99
)
{
for
(
UInt
dim
=
0
;
dim
<
spatial_dimension
;
++
dim
)
{
boundary
(
n
,
dim
)
=
true
;
}
}
}
// #if defined (AKANTU_DEBUG_TOOLS)
// Vector<Real> facet_center(spatial_dimension);
// facet_center(0) = 0;
// facet_center(1) = -0.16666667;
// facet_center(2) = 0.5;
// debug::element_manager.setMesh(mesh);
// debug::element_manager.addModule(debug::_dm_material_cohesive);
// debug::element_manager.addModule(debug::_dm_debug_tools);
// //debug::element_manager.addModule(debug::_dm_integrator);
// #endif
/// initial conditions
Real
loading_rate
=
1
;
Real
disp_update
=
loading_rate
*
time_step
;
for
(
UInt
n
=
0
;
n
<
nb_nodes
;
++
n
)
{
velocity
(
n
,
0
)
=
loading_rate
*
position
(
n
,
0
);
velocity
(
n
,
1
)
=
loading_rate
*
position
(
n
,
0
);
}
model
.
synchronizeBoundaries
();
model
.
updateResidual
();
std
::
stringstream
paraview_output
;
paraview_output
<<
"extrinsic_parallel_tetrahedron_"
<<
psize
;
model
.
setBaseName
(
paraview_output
.
str
());
model
.
addDumpFieldVector
(
"displacement"
);
model
.
addDumpFieldVector
(
"velocity"
);
model
.
addDumpFieldVector
(
"acceleration"
);
model
.
addDumpFieldVector
(
"residual"
);
model
.
addDumpFieldTensor
(
"stress"
);
model
.
addDumpFieldTensor
(
"grad_u"
);
model
.
addDumpField
(
"partitions"
);
// model.getDumper().getDumper().setMode(iohelper::BASE64);
model
.
dump
();
model
.
setBaseNameToDumper
(
"cohesive elements"
,
paraview_output
.
str
()
+
"_cohesive_elements"
);
model
.
addDumpFieldVectorToDumper
(
"cohesive elements"
,
"displacement"
);
model
.
addDumpFieldToDumper
(
"cohesive elements"
,
"damage"
);
model
.
dump
(
"cohesive elements"
);
std
::
stringstream
error_stream
;
error_stream
<<
"error"
<<
".csv"
;
std
::
ofstream
error_output
;
error_output
.
open
(
error_stream
.
str
().
c_str
());
error_output
<<
"# Step, Average, Max, Min"
<<
std
::
endl
;
if
(
checkDisplacement
(
model
,
type
,
error_output
,
0
,
true
))
{}
/// Main loop
for
(
UInt
s
=
1
;
s
<=
max_steps
;
++
s
)
{
/// update displacement on extreme nodes
for
(
UInt
n
=
0
;
n
<
mesh
.
getNbNodes
();
++
n
)
{
if
(
position
(
n
,
0
)
>
0.99
||
position
(
n
,
0
)
<
-
0.99
)
{
displacement
(
n
,
0
)
+=
disp_update
*
position
(
n
,
0
);
displacement
(
n
,
1
)
+=
disp_update
*
position
(
n
,
0
);
}
}
model
.
checkCohesiveStress
();
model
.
solveStep
();
if
(
s
%
100
==
0
)
{
if
(
prank
==
0
)
std
::
cout
<<
"passing step "
<<
s
<<
"/"
<<
max_steps
<<
std
::
endl
;
}
}
model
.
dump
();
model
.
dump
(
"cohesive elements"
);
if
(
!
checkDisplacement
(
model
,
type
,
error_output
,
max_steps
,
false
))
{
finalize
();
return
EXIT_FAILURE
;
}
finalize
();
return
EXIT_SUCCESS
;
}
bool
checkDisplacement
(
SolidMechanicsModelCohesive
&
model
,
ElementType
type
,
std
::
ofstream
&
error_output
,
UInt
step
,
bool
barycenters
)
{
Mesh
&
mesh
=
model
.
getMesh
();
UInt
spatial_dimension
=
mesh
.
getSpatialDimension
();
const
Array
<
UInt
>
&
connectivity
=
mesh
.
getConnectivity
(
type
);
const
Array
<
Real
>
&
displacement
=
model
.
getDisplacement
();
UInt
nb_element
=
mesh
.
getNbElement
(
type
);
UInt
nb_nodes_per_elem
=
Mesh
::
getNbNodesPerElement
(
type
);
StaticCommunicator
&
comm
=
StaticCommunicator
::
getStaticCommunicator
();
Int
psize
=
comm
.
getNbProc
();
Int
prank
=
comm
.
whoAmI
();
if
(
psize
==
1
)
{
std
::
stringstream
displacement_file
;
displacement_file
<<
"displacement/displacement_"
<<
std
::
setfill
(
'0'
)
<<
std
::
setw
(
6
)
<<
step
;
std
::
ofstream
displacement_output
;
displacement_output
.
open
(
displacement_file
.
str
().
c_str
());
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
for
(
UInt
n
=
0
;
n
<
nb_nodes_per_elem
;
++
n
)
{
UInt
node
=
connectivity
(
el
,
n
);
for
(
UInt
dim
=
0
;
dim
<
spatial_dimension
;
++
dim
)
{
displacement_output
<<
std
::
setprecision
(
15
)
<<
displacement
(
node
,
dim
)
<<
" "
;
}
displacement_output
<<
std
::
endl
;
}
}
displacement_output
.
close
();
if
(
barycenters
)
{
std
::
stringstream
barycenter_file
;
barycenter_file
<<
"displacement/barycenters"
;
std
::
ofstream
barycenter_output
;
barycenter_output
.
open
(
barycenter_file
.
str
().
c_str
());
Element
element
(
type
,
0
);
Vector
<
Real
>
bary
(
spatial_dimension
);
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
element
.
element
=
el
;
mesh
.
getBarycenter
(
element
,
bary
);
for
(
UInt
dim
=
0
;
dim
<
spatial_dimension
;
++
dim
)
{
barycenter_output
<<
std
::
setprecision
(
15
)
<<
bary
(
dim
)
<<
" "
;
}
barycenter_output
<<
std
::
endl
;
}
barycenter_output
.
close
();
}
}
else
{
if
(
barycenters
)
return
true
;
/// read data
std
::
stringstream
displacement_file
;
displacement_file
<<
"displacement/displacement_"
<<
std
::
setfill
(
'0'
)
<<
std
::
setw
(
6
)
<<
step
;
std
::
ifstream
displacement_input
;
displacement_input
.
open
(
displacement_file
.
str
().
c_str
());
Array
<
Real
>
displacement_serial
(
0
,
spatial_dimension
);
Vector
<
Real
>
disp_tmp
(
spatial_dimension
);
while
(
displacement_input
.
good
())
{
for
(
UInt
i
=
0
;
i
<
spatial_dimension
;
++
i
)
displacement_input
>>
disp_tmp
(
i
);
displacement_serial
.
push_back
(
disp_tmp
);
}
std
::
stringstream
barycenter_file
;
barycenter_file
<<
"displacement/barycenters"
;
std
::
ifstream
barycenter_input
;
barycenter_input
.
open
(
barycenter_file
.
str
().
c_str
());
Array
<
Real
>
barycenter_serial
(
0
,
spatial_dimension
);
while
(
barycenter_input
.
good
())
{
for
(
UInt
dim
=
0
;
dim
<
spatial_dimension
;
++
dim
)
barycenter_input
>>
disp_tmp
(
dim
);
barycenter_serial
.
push_back
(
disp_tmp
);
}
Element
element
(
type
,
0
);
Vector
<
Real
>
bary
(
spatial_dimension
);
Array
<
Real
>::
iterator
<
Vector
<
Real
>
>
it
;
Array
<
Real
>::
iterator
<
Vector
<
Real
>
>
begin
=
barycenter_serial
.
begin
(
spatial_dimension
);
Array
<
Real
>::
iterator
<
Vector
<
Real
>
>
end
=
barycenter_serial
.
end
(
spatial_dimension
);
Array
<
Real
>::
const_iterator
<
Vector
<
Real
>
>
disp_it
;
Array
<
Real
>::
iterator
<
Vector
<
Real
>
>
disp_serial_it
;
Vector
<
Real
>
difference
(
spatial_dimension
);
Array
<
Real
>
error
;
/// compute error
for
(
UInt
el
=
0
;
el
<
nb_element
;
++
el
)
{
element
.
element
=
el
;
mesh
.
getBarycenter
(
element
,
bary
);
/// find element
for
(
it
=
begin
;
it
!=
end
;
++
it
)
{
UInt
matched_dim
=
0
;
while
(
matched_dim
<
spatial_dimension
&&
Math
::
are_float_equal
(
bary
(
matched_dim
),
(
*
it
)(
matched_dim
)))
++
matched_dim
;
if
(
matched_dim
==
spatial_dimension
)
break
;
}
if
(
it
==
end
)
{
std
::
cout
<<
"Element barycenter not found!"
<<
std
::
endl
;
return
false
;
}
UInt
matched_el
=
it
-
begin
;
disp_serial_it
=
displacement_serial
.
begin
(
spatial_dimension
)
+
matched_el
*
nb_nodes_per_elem
;
for
(
UInt
n
=
0
;
n
<
nb_nodes_per_elem
;
++
n
,
++
disp_serial_it
)
{
UInt
node
=
connectivity
(
el
,
n
);
if
(
!
mesh
.
isLocalOrMasterNode
(
node
))
continue
;
disp_it
=
displacement
.
begin
(
spatial_dimension
)
+
node
;
difference
=
*
disp_it
;
difference
-=
*
disp_serial_it
;
error
.
push_back
(
difference
.
norm
());
}
}
/// compute average error
Real
average_error
=
std
::
accumulate
(
error
.
begin
(),
error
.
end
(),
0.
);
comm
.
allReduce
(
&
average_error
,
1
,
_so_sum
);
UInt
error_size
=
error
.
getSize
();
comm
.
allReduce
(
&
error_size
,
1
,
_so_sum
);
average_error
/=
error_size
;
/// compute maximum and minimum
Real
max_error
=
*
std
::
max_element
(
error
.
begin
(),
error
.
end
());
comm
.
allReduce
(
&
max_error
,
1
,
_so_max
);
Real
min_error
=
*
std
::
min_element
(
error
.
begin
(),
error
.
end
());
comm
.
allReduce
(
&
min_error
,
1
,
_so_min
);
/// output data
if
(
prank
==
0
)
{
error_output
<<
step
<<
", "
<<
average_error
<<
", "
<<
max_error
<<
", "
<<
min_error
<<
std
::
endl
;
}
if
(
max_error
>
1.e-9
)
{
std
::
cout
<<
"Displacement error is too big!"
<<
std
::
endl
;
return
false
;
}
}
return
true
;
}
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