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Blind Bolt Bending Analysis

Blind Bolt Bending Analysis

Blind Bolt Bending Analysis

(OP)
Hello,

Does anyone know why within structural aerospace analysis the preference appears to be to ignore blind bolts in bending?

John.

RE: Blind Bolt Bending Analysis

What do you mean by "ignore blind bolts in bending"?  not perform a stress analysis of a bolt in a particular joint configuration?  not use such bolts in a highly eccentric joint? ignore them in a load share analysis? or something else?

Please post the detailed reason for your question, and details of your particular joint configuration, strap materials, loadings, etc.
 

RE: Blind Bolt Bending Analysis

As far as I know, blind bolts are fitted to interference holes. As long as the interference is intact, bending can be neglegted in most cases.

Dan
 

RE: Blind Bolt Bending Analysis

Bolt bending is not a function of hole fit, but of joint eccentricity as SWComposites infers.

Blind bolts are not preferred for large-eccentricity joints.  They lack the clamp-up capability of a traditional threaded fastener, and will fail prematurely in that usage.  That's why you can't find data or analysis for that failure mode; it's a bad design detail.

SuperStress

RE: Blind Bolt Bending Analysis


 Fastener bending occurs (or can occur) in non-interference shear joints.
That is a more elaborate answer to my interpretation of the OP question.

Dan

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