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Composites Layup

  1. Jun 8, 2017 #1
    1. The problem statement, all variables and given/known data
    Given a composites tube made up of +45 layup. The tube is subjected to positive torque. Suggest a new layup that will improve the strength of the tube when subject to clockwise and anti-clockwise torque. Motivate your choice.

    2. Relevant equations


    3. The attempt at a solution
    I think the layup should be [+45/-45] as this will provide shear strength on both torque directions. But should it be symmetry as well?
     
  2. jcsd
  3. Jun 11, 2017 #2

    CWatters

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    Not my field but yes you want layers that are + and -45.

    Google found this..

    http://library.propdesigner.co.uk/tubes.pdf

    This implies if you just had two layers the tube would be stronger in one direction than the other - so you need more than just two layers.

    I don't know if it needs to be symmetric.
     
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