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Homework Help: Angle of shear stress vs normal stress

  1. Jul 4, 2016 #1
    1. The problem statement, all variables and given/known data
    why the angle of shear stress ( θs) is given by θp - 45 ??

    2. Relevant equations

    3. The attempt at a solution
    the difference in angle of shear stress and normal stress is90 degree , am i right? why it's negative 45 degree? is it wrong?

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  2. jcsd
  3. Jul 9, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Jul 9, 2016 #3
    no , can you help ?
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