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Reduction of area with the elastic deformation?

  1. Aug 28, 2013 #1
    In the tensile test practical for ductile materials, up to the elastic limit, the deformation is recoverable (no line defects).

    My question is can there be a reduction of area with the elastic deformation?

    If yes, how it happens?

    I'm a beginner. Thank you!
  2. jcsd
  3. Aug 28, 2013 #2


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    Yes. Look up "Poisson's ratio".

    What sort of answer do you want? Poisson's ratio described what happens, for isotropic materials. For anisotropic materials the concept is similar but there can be up to 21 different parameters rather than just 2 (Young's modulus and Poisson's ratio).

    Or do you you want an answer in terms of metallurgy, or basic physics?
  4. Aug 28, 2013 #3
    I can describe what happens in plastic deformation using line defects. And I need a that level explanation for elastic deformation and reduction of area.
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