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Why shear stress is produce in shafts

  1. Nov 15, 2011 #1
    hi my name is adil from Pakistan.what is a reason to produce shear stress in shaft,can normal stresses is produced in shaft&where is max shear stress is apply in solid shaft at end or center.
     
  2. jcsd
  3. Nov 15, 2011 #2

    Mech_Engineer

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    If a moment is applied to a shaft to create torsion, there is shear stress in the material which is greatest at the outer surface and zero at the center.

    http://en.wikipedia.org/wiki/Torsion_(mechanics [Broken])
     
    Last edited by a moderator: May 5, 2017
  4. Nov 16, 2011 #3
    thanks for answer but why shear stress is zero at center and max at point?
     
  5. Nov 16, 2011 #4
    When a shaft is twisted, does not the outer surface twist the most. The strain is proportional to the radius, so the centre has 0 stress and the outer edge has the most stress.
     
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