Difference of modeling jointed bolts using CFAST vs CBEAM(CBAR)+RBE2 in NX / MSC Nastran?

[Francesco Bro]

Hello,

We are modeling a FEM model for an aerospace company. This structural system is built of several components, attached via jointed bolts (screws).

What would be the difference of using these techniques for FEM modeling the jointed bolts in NX / MSC Nastran?
1- CFAST elements
2- CBEAM(CBAR)+RBE2 elements

Can both formulations support bolt-preload? I found these bulk cards in the docs (maybe for Technique # 2-). Is this also supported for Technique #1-?
a- BOLTFOR or BOLTFRC (NX Nastran)
b- BOLT (MSC Nastran)


Thank you in advance.

Regards,
Francesco

 

[SWComposites]

Please do not double post.

 

[Francesco Bro]

Sorry!