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Regarding threaded hole Kf w/ and w/out preloaded fastener...

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krt222

Mechanical
Dec 8, 2009
10
Hi,

I've done some searching across various forums on this site to little avail so I've decided to post this Q on a few forums:

Can a vacant threaded hole in a structural member which is seeing alternating bending loads and thereby stresses (due to ovalization of the hole) see significant reduction in alternating stresses and thereby benefit fatigue life from installation of a preloaded clearance fit fastener through supporting the hole from ovalization via friction on the contacting thread surfaces?

I've gone so far as some uber big and complex 3D non-linear FE models to look into this, but wanted to see what qualitative information others might have out there on this to temper my results / expectations.

Thank you in advance.
 
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