SOLIDWORKS Design & Help

Created by Angel Ramirez on 9 March, 2018

Can someone run these buckling analyzes to help me figure out the error?

I am attaching a SolidWorks2017 file that shows two buckling analyzes of a simple circular column. In one of them, the column is treated as solid and the result of the buckling factor is correct (in full coincidence with the result of Euler's formula for the same case). In the other analysis, the column is treated as a beam and gives a very large buckling factor and I have not been able to discover if it is a user error, or a solid version error, or a misinterpretation of results or load of data.
It strikes me that, for this same model, the static studies (stresses and deformations) coincide completely, but the buckling results are so different!
What I'm asking you to do is open the file, run both studies, and see if the results match the attached image.
Thank you very much in advance for the collaboration!

Accepted answer

I found the cause: the mesh of the beam. But in any case, this behavior does not seem natural to me, since it does not happen in the static calculation, nor in the vibration one... apparently, only in the buckling one.
I'm reporting it in case it helps someone else (it's quite dangerous to rely on a structure modeled as beams and get these results!).
Best regards!
PS: now I will upload some images so that you can see the change in results depending on the number of elements in the mesh.


0 Other answers