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Moment causing buckling

  1. Jul 9, 2010 #1
    Can a moment about the end of something cause buckling or does it need to be an applied force?

    For instance the uploaded image


    Attached Files:

  2. jcsd
  3. Jul 9, 2010 #2
    Although I do not know your end conditions from your drawing, a end applied moment cannot cause buckling. Buckling arise from the deflection equation E I y'' = M where M is proportional to the lateral deflection, y. In your problem, M, shown above, is just your end applied load and is never a function of the deflection.
  4. Jul 9, 2010 #3
    thank you!
  5. Jul 9, 2010 #4
    No problem,

    I thought I would reply with some additions. My colleague informed me that you can get localized buckling after the beam has deformed. Localized buckling means that it can kink at the edges.
  6. Jul 9, 2010 #5
    I see. That does make sense. Would that lead to structural failure though?
  7. Jul 9, 2010 #6
    I honestly don't know. I would suspect, however, that the failure criterion that you need to worry about is the bending stresses due to the deflection.
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