So, I have a problem with fatigue cracking originating from hot punched holes. From failure forensic reviews, it seems like surface conditions contributed to some of the failures, especially where there are leftover shear marks and laps from punching operations. I did a quick research but it doesn't seem like there are well established standards regarding the finishes of holes generally in terms of hole surface quality. Am I over thinking and that nobody had the same problem previously? Or are there some standard that I am not already aware of that exists?
One of my thoughts is to establish Ra Rp Rz acceptable ranges that can be applied for the holes. But I have doubts about measurement consistency as those measurements are usually more geared towards flat surfaces. What are your thoughts on this?
Thanks for all your help!!