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Formula for bending a rod in the elastic range

  1. May 27, 2017 #1
    Is there a formula to calculate the radius that a rod of a given radius can be bent around while staying in the elastic range?

    For example, if I had a rod that was 1/4" in diameter and made of HDPE (which I think has a modulus of elasticity of 0.8 GPa), how would I calculate the minimum radius the rod could be bent around while still staying in the elastic range so that it could be unwound without deformation?
  2. jcsd
  3. May 27, 2017 #2


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    I think the answer to your question would need more information than just the modulus.

    <Moderator's note: removed advice to post in ME after moving the thread to ME.>
    Last edited by a moderator: May 27, 2017
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