How to apply torque on ellipsetical tube in ANSYS

[Chomtid]

Having a hard time in applying torque on ellipsetical tube? I don't know using rigid regions is a correct choice or not. I Have been running this test through the below command for a week. Hope anyone can hepl me.

/filename,Ellipsetical tube made of ALUMINUM
/title,Aluminum Tube (SHELL99)
/prep7
et,1,shell99
mp,ex,1,200e9
mp,prxy,1,0.3

keyopt,1,2,0
keyopt,1,3,0
keyopt,1,4,0
keyopt,1,5,0
keyopt,1,6,0
keyopt,1,8,0
keyopt,1,9,0
keyopt,1,10,0
keyopt,1,11,0
r,1
rmodif,1,1,6,0,0,0,0,0
rmodif,1,13,1,0,2.5e-3,1,0,2.5e-3

LOCAL,11,1,,,,,,,0.5
CSYS,11
K,1:40,1,0:360:9

K,41:80,1,0:360:9,5

FLST,3,11,3
FITEM,3,1
FITEM,3,2
FITEM,3,3
FITEM,3,4
FITEM,3,5
FITEM,3,6
FITEM,3,7
FITEM,3,8
FITEM,3,9
FITEM,3,10
FITEM,3,11
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,11
FITEM,3,12
FITEM,3,13
FITEM,3,14
FITEM,3,15
FITEM,3,16
FITEM,3,17
FITEM,3,18
FITEM,3,19
FITEM,3,20
FITEM,3,21
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,21
FITEM,3,22
FITEM,3,23
FITEM,3,24
FITEM,3,25
FITEM,3,26
FITEM,3,27
FITEM,3,28
FITEM,3,29
FITEM,3,30
FITEM,3,31
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,31
FITEM,3,32
FITEM,3,33
FITEM,3,34
FITEM,3,35
FITEM,3,36
FITEM,3,37
FITEM,3,38
FITEM,3,39
FITEM,3,40
FITEM,3,1
BSPLIN, ,P51X

FLST,3,11,3
FITEM,3,41
FITEM,3,42
FITEM,3,43
FITEM,3,44
FITEM,3,45
FITEM,3,46
FITEM,3,47
FITEM,3,48
FITEM,3,49
FITEM,3,50
FITEM,3,51
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,51
FITEM,3,52
FITEM,3,53
FITEM,3,54
FITEM,3,55
FITEM,3,56
FITEM,3,57
FITEM,3,58
FITEM,3,59
FITEM,3,60
FITEM,3,61
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,61
FITEM,3,62
FITEM,3,63
FITEM,3,64
FITEM,3,65
FITEM,3,66
FITEM,3,67
FITEM,3,68
FITEM,3,69
FITEM,3,70
FITEM,3,71
BSPLIN, ,P51X
FLST,3,11,3
FITEM,3,71
FITEM,3,72
FITEM,3,73
FITEM,3,74
FITEM,3,75
FITEM,3,76
FITEM,3,77
FITEM,3,78
FITEM,3,79
FITEM,3,80
FITEM,3,41
BSPLIN, ,P51X

l,1,41
l,11,51
l,21,61
l,31,71

LGLUE,ALL
AL,1,5,9,10
AL,2,6,10,11
AL,3,7,11,12
AL,4,8,12,9
AGLUE,ALL

lsel,s,length,,1.211,,,0
lesize,all,,,20
lsel,s,length,,5,,,0
lesize,all,,,100
allsel
amesh,all


K,9999998,0,0,0
K,9999999,0,0,5
nkpt,,9999998
nkpt,,9999999

nsel,s,loc,z,0
d,all,ux,0
d,all,uy,0
d,all,uz,0

allsel
nsel,s,loc,z,5
ET,2,MASS21
!*
!*
KEYOPT,1,1,0
KEYOPT,1,2,0
KEYOPT,1,3,0
!*
!*
R,7,1,1,1, , , ,
type,2
real,7
e,2

 

[BAretired]

I don't know anything about ANSYS, but you may have better luck on the ANSYS forum.

Incidentally, the shape of your tube is elliptical, not ellipsetical.

BA

 

[BAretired]

As a matter of interest, could you simply apply two equal and opposite forces to a stiff plate welded to the end of the tube? The torque would be F*d where F is the force and d is the distance apart.

BA