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LUG LOADED OUT OF ITS PLANE

LUG LOADED OUT OF ITS PLANE

LUG LOADED OUT OF ITS PLANE

(OP)
Hi fellow engineers:

I am analyzing a number of systems brackets. They are riveted or bolted to structure and, the regions in-way-of these connections can be treated as lugs subjected to in-plane and out-of-plane loading. I am familiar with analyzing lugs for in-plane load, but I have not found any means of accounting for out-of-plane effects. I appreciate that true lugs are orientated such that any out-of-plane loading is negligible, but I am seeking to perform a lug-type manual calculation on my brackets.

Any guidance would be appreciated.

Thanks in anticipation.

RE: LUG LOADED OUT OF ITS PLANE

i'd look at transverse bending, at the root of the clevis or male lug (just upsteam from the fillet rad, the minimum section)

RE: LUG LOADED OUT OF ITS PLANE

Can you calculate the stress on the surfaces due to bending and convert that into an equivalent in-plane loading case?

RE: LUG LOADED OUT OF ITS PLANE

there's a small reference to lug bending out-of-plane, para 9.5.1, which is looking at lug bending due to single shear (offset load) ... not exactly the same as you're asking about, but it's what we do here.

RE: LUG LOADED OUT OF ITS PLANE

(OP)
Thanks for responding guys. The posted document is new to me, but certainly looks helpful. I'll need to spend a bit of time getting to grips with it.

Thanks once again!

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