Freeze plugs

[sdar79]

Does anyone know of any good references to use for freeze plugs? I'm looking for something that covers aluminum, titanium, and steel alloys and the primary use is for repairing bad fastener holes in aircraft structure. I'm looking to find:

- the appropriate amount of interference to use with freeze plugs
- how short edge distance affects the amount of desired interference
- if there's any way to calculate residual stresses in the parent material by hand after the plug is installed.

All the references I've found have been quite vague on these topics.

Thanks in advance for your help.

 

[CoffinsCorner]

There have been several threads relating to the use of freeze plugs, e.g. see thread2-211925.

I do not which a/c you are working on, but if it´s Boeing you could look in SRM 51-20-XX.
In Addition, the study material related to the Boeing course: Structural Repair for Engineers - Part 1, offers some more detailed info.

If Airbus, then see SRM 51-73-12.

I know that Bombardier also have quite detailed info about the use of freeze plugs (would have to check for reference).

Good luck,

 

[GrandpaDave]

Try "Googling" the following 3 words: freeze plugs aircraft.
If you don't add aircraft, then you’ll get tons of info on Automotive.
I'm not a liaison engineer, but most aircraft companies have very strict
procedures to following when making repairs. This was true when I work on
unmanned missiles and such... I'm assuming that would be the case on
commercial and military aircraft if not more so.