Epoxy strength [was Titanium (mission knives)]

Cliff Stamp

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In the old general forum in the following thread :

http://www.bladeforums.com/ubb/Forum1/HTML/001832-2.html

Steve commented :

I believe that modern epoxies have yield strengths in the thousands of pounds per square inch.

We have to contain high pressure gasses in our lab. There is a window on the end of a high pressure tubing that is simply glued on using some cheap epoxy, nothing fancy. The epoxy has held up under 25 000 psi of gas. I had to take it off last year and tried to beat it off by putting a metal rod down the tube and slamming it off of the floor. No chance.

You can get much better glues than what we use (we just don't need them). Namviet has commented that you can get them strong enough that the material you are gluing will rip apart before the glue bonds break. I seriously doubt there is a man alive that could pull a MD grip off of the knife unless the bond has been weakened due to rust.

I like Steve would be curious to know just what stresses the knife had seen to have the bond compromised.

-Cliff
 
I would say that if an Epoxy Bond failed it was probably due to not gettng a good clean bond in the first place. It doesn't really matter if you are talking about cheap or premium epoxies if there is dirt or oil on the surface the epoxy cannot bond to it effectively.
 
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