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Homework Help: What equation is this defined as?

  1. Oct 2, 2009 #1
    Is this a stress/strain, or elastic modulus equation? or have I got my understanding wrong?
    The question asks where does this come from? I've never seen it before maybe someone can expand for me please?

    http://i45.photobucket.com/albums/f98/pastilles/equation.jpg [Broken]

    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 2, 2009 #2


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    Are you referring to [itex]\gamma=\psi_1-\psi_2[/itex]? It's not a stress-strain relation because there's no constant of proportionality that would correspond to an elastic modulus.

    Gamma is often used to denote shear strain, though.
  4. Oct 3, 2009 #3
    Thank you,

    I haven't run across this before. I will read some more on shear strain in some textbooks.
    Once again thank you :)
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