Beam Element

[JohnLL]

Guys it might seem easy question, but as a non-expert in FEA, your answers is quite helpful here!

Assume we model a structure (let's say a frame) using beam elements. The cross section is I-beam and we define it by geometry.
Now after solving the job, we have bending moments, axial forces, etc along the frame members.

The question is "does it calculate stresses in the cross section or we have to do it separately?" for example, using AISC design code, we have to check the buckling in flange to make sure the axial compression and bending does not lead to buckling. or any over stressing occur in web.

What I am not sure about is that whether ABAQUS just use cross sections in determining global behavior or beam element with specified cross section calculates the local over-section situation?

If the answer is yes, what is the difference between modeling 3D and using beam elements?

 

[GregLocock]

In order to analyse the deflection of the ends of the beam element it does not need the internal stresses in the beam. Therefore, absent further processing, the answer is no.

However establishing those internal stresses is a banal bit of book keeping, so there may be an existing command to recover those stresses, or a modestly capable engineer could write a post processor to do so, the only tricky part is understanding the orientation of the section.

Ask your sales rep.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[GregLocock]

I've just remembered that beam stresses are a display option in FEMAP post processing, my guess is it'll be a built in function.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?