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F79747797
patch_test_linear_elastic_explicit.cc
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Created
Wed, Aug 28, 01:16
Size
1 KB
Mime Type
text/x-c
Expires
Fri, Aug 30, 01:16 (2 d)
Engine
blob
Format
Raw Data
Handle
20211807
Attached To
rAKA akantu
patch_test_linear_elastic_explicit.cc
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/* -------------------------------------------------------------------------- */
#include "patch_test_linear_fixture.hh"
/* -------------------------------------------------------------------------- */
TYPED_TEST
(
TestPatchTestLinear
,
Explicit
)
{
std
::
string
filename
=
"material_check_stress_plane_stress.dat"
;
if
(
this
->
plane_strain
)
filename
=
"material_check_stress_plane_strain.dat"
;
this
->
initModel
(
_explicit_lumped_mass
,
filename
);
const
auto
&
coordinates
=
this
->
mesh
->
getNodes
();
auto
&
displacement
=
this
->
model
->
getDisplacement
();
// set the position of all nodes to the static solution
for
(
auto
&&
tuple
:
zip
(
make_view
(
coordinates
,
this
->
dim
),
make_view
(
displacement
,
this
->
dim
)))
{
this
->
setDisplacement
(
std
::
get
<
1
>
(
tuple
),
std
::
get
<
0
>
(
tuple
));
}
for
(
UInt
s
=
0
;
s
<
100
;
++
s
)
{
this
->
model
->
solveStep
();
}
auto
ekin
=
this
->
model
->
getEnergy
(
"kinetic"
);
EXPECT_NEAR
(
0
,
ekin
,
1e-16
);
this
->
checkDisplacements
();
this
->
checkStrains
();
this
->
checkStresses
([
&
](
const
Matrix
<
Real
>
&
pstrain
)
{
Real
nu
=
this
->
model
->
getMaterial
(
0
).
get
(
"nu"
);
Real
E
=
this
->
model
->
getMaterial
(
0
).
get
(
"E"
);
auto
strain
=
(
pstrain
+
pstrain
.
transpose
())
/
2.
;
auto
trace
=
strain
.
trace
();
auto
lambda
=
nu
*
E
/
((
1
+
nu
)
*
(
1
-
2
*
nu
));
auto
mu
=
E
/
(
2
*
(
1
+
nu
));
if
(
not
this
->
plane_strain
)
{
lambda
=
nu
*
E
/
(
1
-
nu
*
nu
);
}
decltype
(
strain
)
stress
(
this
->
dim
,
this
->
dim
);
if
(
this
->
dim
==
1
)
{
stress
(
0
,
0
)
=
E
*
strain
(
0
,
0
);
}
else
{
for
(
UInt
i
=
0
;
i
<
this
->
dim
;
++
i
)
for
(
UInt
j
=
0
;
j
<
this
->
dim
;
++
j
)
stress
(
i
,
j
)
=
(
i
==
j
)
*
lambda
*
trace
+
2
*
mu
*
strain
(
i
,
j
);
}
return
stress
;
});
}
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