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Axial deformation problem

  1. Nov 22, 2013 #1
    ---Quote---
    *1. The problem statement, all variables and given/known data*

    http://postimg.org/image/yrbu7a0vb/

    *2. Relevant equations*

    e(elongation of a member) = (Force * Length)/(Area * Young's Modulus)


    *3. The attempt at a solution*


    Is the force P distributed so that the force on each bar is P/3 so that F2 would be (14/3)?


    How do I use that value and the elongation equation to find the width of the gap?
    I'm not sure what the relationship should be


    thanks
     
  2. jcsd
  3. Nov 22, 2013 #2

    NascentOxygen

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    In (a), the centre column just avoids contact with the beam, leaving the two outer columns to support the entire force P.
     
  4. Nov 22, 2013 #3

    haruspex

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    In part a)? No. When the gap is only just closed, there is not yet any force on the central pillar.
    This is a question about bending moments and beam deflection. I don't see where elongation comes in before part b).
     
  5. Nov 22, 2013 #4

    NascentOxygen

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    I don't think it is. I read it as the rigid beam does not bend.
     
  6. Nov 23, 2013 #5

    haruspex

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    You're right - sorry. I completely misread it.
     
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