Adhesive Tests

Adam12

Hey, does anyone know a backyard method for testing adhesive strength?

Need to compare the strength of things like sellotape/masking tape.

Cheers
A

PerennialII

How about something like shear lap joints ?

http://www.sintef.no/content/page1____5519.aspx

Adam12

Cheers PerennialII, but doesn't that add a new dimension of shear force in to it? Looks tricky too...

PerennialII

It's a 'classic' used quite a bit in testing shear behavior of adhesives, solders etc or joint strength overall. The shear profile over the adhesive is somewhat complex near the 'edges', but controllable. So suppose it bears down to what properties you want to extract, for adhesive typically shear tests, for bare tape can do "plain" tensile tests, or want to know the joint strength, which is affected by both the adhesive and the tape?

Adam12

Hmm, what about the "plain" tensile test?

PerennialII

That would be straightforward .... make a load frame of sorts and load it by weights for easiest possible instrumentation, some info and principles :

http://www.instron.us/wa/application...n/default.aspx
http://www.mts.com/Insight/index.asp

.... just always with these things got to make sure the result you measure is what you actually want (referring to what information / what material's or joint information you want to study).

Adam12

Dude, thanks so much.

Cheers
A