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A
lot of examples show that the
performance of standard compatible
8-node compatible solid elements
is unsatisfactory and wrong.
In XFINAS, four kinds of 8-node
hexahedral elements are presented
for the analysis of thick and
thin walled structures. The
XSOLID81~4 solid element
used both the Enhanced Assumed
Strain (EAS) method and Assumed
Natural Strain (ANS) method
to eliminate locking effects.
The XSOLID8R solid element
used the stabilized technique
to control the hourglass mode
and the assumed strain natural
method to eliminate locking
effects. The integration scheme
of the XSOLID81-4 solid
element requires full integration
but the integration scheme of
the XSOLID8R solid element
requires 1 point integration.
The XSOLID84 is implemented
in the current version.
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| Mid-Surface Geometry
and Local Coordinates of 4 Node
Shell
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| Example.
Linear analyses of a hemispherical
shell (Fig.14) with 18 degree
hole under pinched loading are
carried out to validate the
bending and membrane behaviour
of XSOLID.
Table
Results of hemispherical shell
with 18° hole (Reference
solution = 0.094)
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Element
Size
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Normalized
Solutio
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XSOLID81
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XSOLID82
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XSOLID83
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XSOLID84
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XSOLID85
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XSOLID8F
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4*4*1
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0.0922
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0.0409
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0.0897
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1.0587
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0.0123
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0.0007
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8*8*1
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0.8698
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0.7446
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0.8626
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1.0051
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0.1838
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0.0027
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10*10*1
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0.9533
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0.9071
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0.9495
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0.9993
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0.3536
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0.0041
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Preprocessing
of Hemispherical
shell
with 18 degree hole
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Postprocessing of
hemispherical shell
with 18 degree hole
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| Example : The
solution of a simply supported rhombic plate subjected to a uniformly
distributed load is presented. The numerical results of plate center deflection
are presented in Table. The reference solution is W c =0.04455. Good result is
obtained from the present elements. |
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| Table
Results of rhombic plate
(W=0.04455)
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Element
Size
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Normalized
Solutio
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XSOLID81
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XSOLID82
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XSOLID83
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XSOLID84
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XSOLID85
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XSOLID8F
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4*4*1
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0.8790
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0.9464
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0.8745
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0.8790
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0.3203
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0.0215
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8*8*1
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0.8705
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0.9535
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0.8649
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0.8705
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0.6763
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0.0715
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16*16*1
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0.9273
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0.9856
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0.9246
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0.9273
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0.8889
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0.1832
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20*20*1
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0.9475
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0.9960
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0.9452
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0.9475
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0.9299
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0.2325
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32*32*1
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0.9852
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1.0146
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0.9832
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0.9852
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0.9868
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0.3528
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|  Bond-slip behaviour of Basemnet of Pylon
in cable stayed bridges
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| 3D modeling of reinforicing
bar and concrete in basement
of pylon
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| Bond-slip behaviour of
reinforicing bar and concrete in basement of pylon |
