Non-linear buckling C-channel

[RudyLow]

Hi everyone,

I'm new to Abaqus and FEA. Currently I am assigned to do a FEM for
a C-channel. And I have not taken any FEA classes (not in my syllabus).
And I tried to figure it myself, I can't found what's wrong.

I model the c-channel as a shell part. Loaded with shell load,
with pinned end support on both end. allowable rotation at DZ.
Step I used, general, RIKS.
However, I couldn't get load capacity same with what I am calculating.
Difference was too large.
If i use concentrated load in some point, the buckling of the C-channel are not logical.

I hope someone can guide me. I don't know what went wrong.

 

[rb1957]

what the heck is a .cae file ? ... post .jpg or .pdf.

2nd, stop whatever you're doing, and step away from the keyboard. if you're new to FEA i don't think you should jump in at the deep end.
have you tried to reproduce an example problem from the manual ?

what makes this problem so difficult that you need to use FEA ?

why do you think you need to explore non-linear buckling ? what's the crippling allowable of the section ?