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Strain energy in a tapered rod under torsion

  1. Apr 5, 2014 #1
    1. The problem statement, all variables and given/known data
    7Q3sBk4.png

    3. The attempt at a solution
    http://imgur.com/3ZfjPxM.png

    So if you look at my attempt, I integrated the strain energy density function and at the end everything cancels out. Does anyone know what I did wrong?
     
    Last edited: Apr 5, 2014
  2. jcsd
  3. Apr 5, 2014 #2

    SteamKing

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    I don't see your calculations. Please post them.
     
  4. Apr 5, 2014 #3
    Oops, sorry, I have posted my solution.
     
  5. Apr 7, 2014 #4
    bump.
     
  6. Apr 15, 2014 #5
    last bump.
     
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