Many thanks Andrew for your analysis! It correlates to my rough test, but
using factory prepreg bits (off-trims). In my test of old araldite, the
failure was in the epoxy, and not the bond.
FWIW, ymmv,
Cheers and thanks again!
Pete
On Tue, Aug 3, 2021 at 6:34 PM Andrew Sarangan <asarangan@gmail.com> wrote:
> I tested my 20 year old Araldite 420 and found it to be almost the same
> shear strength as the new stuff. I thought I'd share the results with you.
> You can find the details here:
>
>
> http://sarangan.org/aviation/2021/08/03/lap-shear-test-results-of-araldite-epibond-420-aerospace-epoxy/
>
>
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