topic Re: Lug Detachment Issue in Fusion Design, Validate & Document Forum

Lug Detachment Issue

12521504XJQK — Wed, 28 Jan 2026 11:08:53 GMT

Hey all,

I have been having an issue with an FEA I'm running for a lifting beam. I'm not very experienced with contatcs and I think I may have a contact issue, any help would be greatly appreciated.

For some reason, one of my lifting lugs is detaching from my lifting beam during simulation while the other isn't. Both have the same load case and are made from the same material, have the same contact and I cannot figure out why this isn't working.

Many thanks,

Simeon

Re: Lug Detachment Issue

dsouzasujay — Wed, 28 Jan 2026 19:20:21 GMT

Hello @12521504XJQK
It’s likely that Bolt Connectors (or Rigid Body Connectors) are being applied to the same face or edge that’s also selected for a constraint. A possible workaround is to switch to the Simplify workspace and split the face around the bolt holes.

Also make sure to add mesh control to refine the mesh near the Connectors.

let me know if this works.

(view in My Videos)

Re: Lug Detachment Issue

oliviagrace4990 — Wed, 28 Jan 2026 19:28:53 GMT

This usually happens when the contact definitions aren’t perfectly identicale, ven small differences in contact type, mesh refinement, or tolerance can make one lug behave differently. Double-check that both lugs have the same contact stiffness, surface assignment, and that the mesh is fine enough around both. Sometimes just slightly refining the mesh or adjusting the contact offset fixes it.

Re: Lug Detachment Issue

dsouzasujay — Thu, 29 Jan 2026 03:04:25 GMT

Hi @oliviagrace4990 ,

We don’t need to define additional contacts or contact sets since a bolt connection has already been defined between the two components. I agree that the mesh needs to be refined—especially around the bolt connector area, where applying mesh controls would be beneficial.

Re: Lug Detachment Issue

rosie_lucas1 — Tue, 03 Feb 2026 19:13:19 GMT

Hello @12521504XJQK,

Did the information provided by @dsouzasujay and @oliviagrace4990 help you and answer your question?

If yes, please click on the "Accept Solution" button on the post(s) that solved your problem. This will assist other community users in finding and benefiting from this information.

If not, please do not hesitate to give an update in this thread so all community members receive an update on the progression of your question, and can suggest next steps that may be helpful for you to achieve what you're looking for.

All the best,

Rosie | Community Manager

Re: Lug Detachment Issue

12521504XJQK — Fri, 06 Feb 2026 14:04:30 GMT

This has helped. Thank you very much

Re: Lug Detachment Issue

12521504XJQK — Fri, 06 Feb 2026 14:05:20 GMT

@dsouzasujay this has helped again, thank you very much

Re: Lug Detachment Issue

dsouzasujay — Fri, 06 Feb 2026 14:30:04 GMT

Thank you @12521504XJQK .