Quote:
Originally Posted by kaiser
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This is well within the plastic deformation of the bolt, and the bolt will behave according to Hooke's law. That is that the force exerted by the bolt will be linear and proportional with the stretch, and totally reversible.
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Not correct.
Hooke's law only applies in the elastic region of the stress-strain curve.
A 1mm stretch of a circa 400mm steel rod (bolt) actually represents quite a large strain.
Also, plastic deformation, which is what is said to occur with these bolts, continues beyond the yield point for many metallic materials so to use the term torque-to-yield is not inaccurate in this application.