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Homework Help: Mechanics of Materials - is this correct?

  1. Dec 2, 2011 #1
    1. The problem statement, all variables and given/known data

    question110.jpg



    2. Relevant equations

    neededformulas.jpg



    3. The attempt at a solution

    solve002.jpg

    I was attempting to solve this exercise, but since I have no answers, I have no way of knowing if it's correct.

    Any help Is more than appreciated
     
  2. jcsd
  3. Dec 2, 2011 #2

    PhanthomJay

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    You did a superior job with this and your work is well presented.. the lowest value of P is the answer. Excellent work!
     
  4. Jan 27, 2012 #3
    All the best! There is my verification
    http://img821.imageshack.us/img821/8128/tophysicsforum02.png [Broken]
     
    Last edited by a moderator: May 5, 2017
  5. Jan 27, 2012 #4
    By the way Elongations (z - from left to right within each segment)
    [itex]w_{{1}}=4\,{\frac {Pz}{E\pi \,{{\it Diam}}^{2}}}[/itex]

    [itex]w_{{2}}=4\,{\frac {P \left( z{{\it Diam}}^{2}+a{{\it diam}}^{2}
    \right) }{{{\it Diam}}^{2}E\pi \,{{\it diam}}^{2}}}[/itex]
     
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