Learning Forum

[Muhammad Zeeshan]

Hi there!

Can anyone please let me understand how we can get critical buckling moment of a beam with a mid point concentrated load?

I'm working on a project to first model a beam with a concentrated load & get critical moment from ansys and then verifying the answers with EC3 methodology. Later on, will do parametric study on the same beam in ansys.

Every literature i read just mentions the results of critical buckling moment (Mcr) but doesn't define how they got it particularly from ansys since ansys only tells you the load factor which one is supposed to multiply with the applied load to get critical buckling load but I'm looking to get critical moment?

#Question #Structure #Buckling #Mechanical

[dlooman]

You can apply the buckling factor times the mid-pt moment.  Presumable that's Mcr.  The moment could be calculated by hand or retrieved from the static analysis.

[Muhammad Zeeshan]

Hi Dave!

Thanks a lot for your response. I did the same last night. Multiplying the load factor with the bending value from BMD. Don't have the idea to extract BMD or SFD for a solid in ansys hence generated them by hand because all the queries i went through, it says you can't get BMD values for a solid in ansys unless it's defined by a line body.

[dlooman]

Sorry.  I assumed the model was a beam model.  Can you calculate the moment by hand?

[Muhammad Zeeshan]

Yes I can. You got any idea whether we can develop the kind of BMD for a solid in ansys?

[dlooman]

No, I'm afraid not.

[Erik Kostson]

Hi

See if this helps (section forces and moments on 3D part bodies):

/forum/forums/topic/can-you-determine-the-resultant-force-when-using-section-planes/

All the best

Erik

[Muhammad Zeeshan]

Thanks Erik. I'll definitely look into it.