As Ken said, that’s tensile strength, not pressure. I’m a bit confused on the
description though. Like, 2 o-ring grooves on either side of the bolt holes
doesn’t make sense to me? What purpose do the o-ring grooves serve on the other
side of the bolt holes or is it a fixed piston between tank and CC?
Also, glue and o-ring grooves should rarely be mixed/combined together.
O-rings can seal very high pressures if designed correctly, but they work on
*pressure* to create their seal ie. they need to be extruded against the
opposing gap to create a positive seal.
As Mark as said, adhesives have been extensively used to fix bulkheads and
closures of single use HPR solid motors over a long period. It works if
designed correctly.
High temp JB weld is good adhesive – it will bond to things that more regular
epoxy won’t (eg: PVC plastic) but it’s also quite brittle once fully cured –
which should really matter much for closure retention relying on the shear
strength & adhesion of any adhesive used, although watch out for potential
diameter increases from strain if the closure is directly bonded to the inside
of the tubing wall, although if also using franken-bolt retention in
combination, that should mitigate that issue substantially.
Troy
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Jack Hanna
Sent: Sunday, 29 August 2021 4:02 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] JB Weld Usability
Hello!
I've been working on a hybrid engine recently and picked up some JB weld for
cheap, and have been wondering if it's a semi-practical bulkhead adhesive that
can keep pressure. I'm planning on having two o ring grooves on either side of
bolt holes to have a hopefully overkill secure piece, however I'm wondering
especially with the hose threads if I could JB-weld it together to effectively
get one piece. Has anyone here used it and if so what are some of its
limitations or things to note when using. Thanks! Also, it says "5020 PSI" on
the packaging, i'm assuming that's the best case scenario and wondering what
practical pressures it can handle in terms of leakage.
