Breakaway Bolt Design
Breakaway Bolt Design
(OP)
I am currently working on a breakaway Bolt Design. Ideally the first head of the bolt will break off at 45 ft-lbs. How can I calculate when the head will break off, assuming I know the neck down diameter that will break.





RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
If your tests came back with a range of +-2 lbs and your requirement is +-50 lbs you may be good. But if your requirement range is +-5 lbs you will need more samples.
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
I have done these kind of fixings in the past, the formula you've quoted is for the torsional stresses in the elastic region, the formula I would use is the one that gives the plaits stress for the whole cross section ie:- 4/3 * T.
Then I would do some practical tests and adjust my bolt groove to allow for strain hardening etc.
It's worked well for me in the past.
RE: Breakaway Bolt Design
Quando Omni Flunkus Moritati
RE: Breakaway Bolt Design
rb1957
is so the customer can just tighten them till the head breaks off, makes it dummy proof.
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design
http://www.lisi-aerospace.com/products/fasteners/e...
RE: Breakaway Bolt Design
RE: Breakaway Bolt Design