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Homework Help: Torsion and plastic deformations

  1. Apr 26, 2010 #1
    the foollowing hollow shaft has a torsion applied to it so that the plastic area reaches the inner radius, what is the magnitude of the maximum residual shearing stress?



    i dont see why there should be any residual stress? if the shaft entirely becomes plastic- which as far as i can tell is what happens here- why should i have any residual stress,
    i know that when i have an elastic core, the elastic core wants to return to its original placement and the plastic area wants to stay with its residual strain, leaving each of them a stress and the placement being somewhere inbetween. but why is this so in this case too??
  2. jcsd
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