Tetmajer-Jasinski buckling

paula94

Hello,

 

I have a question concerning buckling analysis. If I use linear static load step and then linear buckling will optistruct calculate the buckling correctly if the buckling occurs according to Tetmajer-Jasinski and not according to Eulers? (the slenderness is higher than 40 but smaller than 100). 

 

I have performed the analysis and the results are wrong as if it was calculated according to Eulers. What should I do to obtain realisic results? I tried to add extra material parameters and do nonlinenar quasi static but its still not working.

 

Thank you for your help in advance.

Rahul Rajan_21763

You could try Nonlinear Transient Analysis.

 

Time Stepping schemes:

Generalized Alpha Method (Default)

• Used for most nonlinear transient simulations
• “Light” numerical damping

Backward Euler Method

• Useful for “quasi-static” post-buckling solutions
• “Heavy” numerical damping
• Dissipative and thus, highly stable