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Direction of stresses in torsion

  1. Aug 13, 2013 #1
    In the fig. attached below,a circular bar is subjected to torsion. A point is considered on the surface of the bar(denoted by point 1). The shear stresses are shown .
    Why don't we take one of the stresses in the radial direction??

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  2. jcsd
  3. Aug 14, 2013 #2


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    The shear stresses vary linearly in the radial direction, from 0 at the center to a max of TR/J at the circumference , but the direction of those stresses on a planar element are circumferential and axial ( longitudinal) only.
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