stretching wire

[William R. Monroe]

Not to be argumentative, but just want to be clear.  What happens when the 
string deflects under load, mashed bridge cap or not?  Wouldn't the string 
have to stretch in order to be deflected?  Does the string have to stretch 
to be tuned?  Are you simply saying that once tensioned and in a static 
state, the string does not passively stretch, but rather the bends around 
it's bearing points continue to change?  If we add more tension to it, or 
deflect it with the pizza wheel, then it will stretch, up to it's elastic 
limit, yes?  If no, what accounts for string deflection?

Thanks,
William R. Monroe

SNIP
> What the roller is doing isn't stretching the wire, it's tightening the 
> bends across the bearing points - and mashing the edge of the bridge cap.
SNIP
> Ron N