stress is the force causing the deformation divided by the area to which the force is applied; and strain is the ratio of the change caused by the stress to the original state of the object. For a piano rib (in a RC&S system) then, the stress would be downbearing and the strain would be the amount of crown loss due to downbearing pressure. Terry Farrell > The problem, I believe, is that "strain" is not an engineering term that > I'm > familiar with and its specific meaning in the description below is vague. > > David Love > davidlovepianos at comcast.net
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