Hi Dale. The permanent elongation in a string you seem to be asking about is as I am sure you already know what is known as plastic deformation and occurs when the string is pulled past what is known as the yield strength point. The following link is provided for your convenience http://en.wikipedia.org/wiki/Tensile_strength The question being thrown around here (as I understand it) is whether or not there is any plastic creep over long time when the wire tension is kept well below this level of stress. As to whether false beats can be created as a result of pulling a string beyond this plastic deformation strengths point.... I'd say there is plenty of evidence out there to support that claim.... quite strong support. Cheers RicB Hi Kurt Thanks for the informative article. I wrote last week about false beats being introduced by over stretching in the first chipping's of newer Steinways, (or any piano) Now that this man has stated that permanent elongation can happen just prior to the string actually breaking has me asking at what point of breaking strain does this permanent elongation occur. For example can a string permanently elongate in any section if pulled up 100 cents past it's intended tension. Or perhaps this only happens in the trebles where the false beats I objected to occur. Of course over pulling a nice short string puts an enormous amount of unscheduled strain on the bridge pins...........heeeeere we go! Hmm? Anybody Dale
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