Buckling Moment from Riks 1

[Hich]

I have performed a Riks analysis. how can I work out buckling moment from that. I need the interaction between yielding and buckling moment

 

[bassmanjax]

Plot the Load Proportionality Factor (LPF) and you should see a change in the loading at the point where the structure has buckled. You can then calculate the buckling load by knowing the LPF and the magnitude of your actual loading.

Check in the manual; "Unstable Collapse & Post-Buckling Analysis".

Regards

Martin Stokes CEng MIMechE

 

[Hich]

thank you mate

 

[Hich]

I checked the LPF but up to very large values for LPF the graph is still straight. what do you think may be the problem that it doesn't actually buckle

 

[bassmanjax]

Did you use the imperfection data from your eigenvalue analysis?

Chances are that if your structure is too 'perfect' then it will buckle at an unrealistically high load.

Martin

 

[Hich]

Thanks mate. I think the problem is that. i did not used any imperfection at all. I will try it