Quote:
Originally Posted by Bonzo
The changing of the bolts is a safety issue on a critical application.
Basic theory is : When a bolt is tightened to the max, it will stretch a fraction.
When the bolt is removed it will stay stretched  If the old bolt is then re-used it is likely to stretch again.
This in theory may result in a weaker bolt that is just within its yeild zone & in theory is more likely to fail ( Shear ) 
More science than that involved but that is the basic theory  |
I see exactly what you mean there, and if I was to unbolt a flywheel I would definitely replace the bolts with new, but my question is that if the bolt stretches, and stays stretched (in other words it's plastic) then where is the clamping force coming from? Wouldn't it want to spring back (elastic) in order for the correct amount of grip to be applied?