Learning Forum

[www.chanees777]

Hi

I am doing buckling analysis on a curved panel whose schematic I have attached. I have been trying to do buckling analysis on this geometry for different cases but results dont seem to be matching with theoretical. Can someone please guide me whats wrong in my code? Lets consider this case

a=b=50mm, Theta=180 degrees, E= 200MPa, t=0.5, poisson ratio=0.3. Thank you very much.

/CLEAR      
/PREP7  
smrt,off
ANTYPE,STATIC  
ET,1,SHELL63,, 
R,1,0.5  
MP,EX,1,200e9 
MP,NUXY,1,0.3   
R1 = 31.38
L = 25
PI = 4*ATAN(1)
T=PI/2
THETA =T*180/PI
CSYS,1 
K,2,R1,90,L
K,3,R1,(90-THETA),L
K,5,R1,90,-L
K,6,R1,(90+THETA),L
K,7,R1,(90-THETA),-L
K,8,R1,(90+THETA),-L
l,3,2   
l,2,6   
l,3,7   
l,7,5   
l,5,8   
l,6,8
lcomb,1,2
lcomb,4,5
al,1,3,4,6
LESIZE,ALL, , ,24, ,1, , ,1,
amesh,1
lsel,s,line,,3
lsel,A,line,,6
nsll,,1
D,ALL, , , , , ,UY, , , , ,
lsel,s,line,,4
nsll,,1
D,ALL,, , , , ,, , , , ,UZ
lsel,s,line,,4
local,11,1,0,0,0,    
nsll,,1          
nrotate,all         
D,ALL, uX, , , , ,, , , , ,    
lsel,s,line,,1
local,11,1,0,0,0,    
nsll,,1          
nrotate,all        
D,ALL,, , , , ,UX, , , , ,    
F,ALL,FZ,-1/25
/sol
PSTRES,1
solve
finish
/sol
ANTYPE,1  
BUCOPT,LANB,2,0,0,CENTER
solve
finish
/post1
set,list

[Sampat Kumar]

It seems you have created a duplicate question. 
I will close this forum query and for additional discourse on this topic, please access the link below.
https://innovationspace.ansys.com/forum/forums/topic/buckling-analysis-on-a-curved-panel/

Thanks,
Sampat