This statement is the only reason I said something. When you stretch an ARP bolt to their specifications I do not think you are getting into plastic deformation. That may be different for new production bolts. Pictures to follow.
A rod bolt can handle more than .001" plastic deformation before it's strength is compromised. That's what I was questioning....
ARP has stated that their bolts can go 4 cycles before needing replacing. If you look back at my original posts in this thread, that is close what I said, we used 5 clamp loads before replacing the bolts.
I have worked with fastener engineering to perform the torque tests and set up the parameters for torquing different joints. I have designed and released bolts and worked with fastener suppliers. I also worked with the leading industry machine builders to set up set up equipment to run engine assembly lines and have run over 4 million engines on those lines with no problem with bolt failures. (As a matter of fact, I improved their fastening capability from what it was before I got there.)
What experience do you have in this matter????
Have you actually performed any bolt stretch studies yourself???