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Homework Help: Poisson's Ratio

  1. Oct 4, 2014 #1
    Hi, I'm wondering if someone can point me in the right direction with this question.

    A material has a modulus of rigidity of 100 GNm-2 and a Young's Modulus of 250 GNm-2. Calculate the expected value of Poisson's Ratio for the material.

    Poisson's Ratio is expressed as transverse strain / axial strain

    So how am I supposed to work this out when the only information I am given is what's above? Or am I misunderstanding the question?

    Any help would be appreciated


  2. jcsd
  3. Oct 4, 2014 #2


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    Staff Emeritus
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    Homework Helper

    For isotropic materials, there is a formula which relates E, G, and poisson's ratio. It's in just about every strength of materials text ever published.

    For a quick refresher, look at this attachment:


    Check out pp. 7 & 8.
  4. Oct 4, 2014 #3
    Thanks very much for that, I'll get reading!
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