North Stand (and Shah):
Several repair methodologies - SRMs - and Liaison and Stress tools suggest bonding as repair for knife edge.
If there is a need for a public reference I would like to point to Michael (Chang Yang) Niu's book:
Airframe Stress analysis and Sizing (ISBN 962-7128-07-4), p. 277 Figure 9.1.5 (c).
This specific repair is coming from MD and Lockheed background. Boeing used to do the same.
Nowadays you do go with protruding fasteners, one oversize.
Dimpling can be used a manufacturing methodology in order to prevent knife edge from happening.
Shah:
I gave you the reference so you can use it for your test. Book is available in any bigger university library.
Regards,