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Pure Shear Questionthanks for your help!

  1. Feb 3, 2007 #1
    1. The problem statement, all variables and given/known data
    Hey everyone. I was practicing some problems, and I came across one that seems pretty simple, yet I am having difficulty proving the answer. The question asks us to show that a state of pure shear causes no volume change in linear elastic deformation. I have a very good understanding on shear stresses and strains, however, this problem seems harder then it actually is. If someone could point me in the right direction I would appreciate it greatly!

    2. Relevant equations
    Strain Eq, Stress Eq, Young's Modulus (standard elementary equations)

    3. The attempt at a solution

    I have literally spent hours reading my book and working out problems, such as these. I seem to understand all of the formulas, however, I am having trouble proving the statement.
  2. jcsd
  3. Feb 3, 2007 #2


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    Homework Helper

    What is the expression for volume deformation, i.e. how does it relate with the principal stresses? What are the values of these stresses for the pure shear state?
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