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Bending moment diagram for overhanging beam

  1. Oct 27, 2015 #1
    I've drawn the free-body diagram of an airplane wing spar. I know the magnitude and location of all forces. What is the procedure to construct the bending moment diagram?

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  2. jcsd
  3. Oct 28, 2015 #2
    If those upward force components F1...Fn are equal in magnitude,then you can simplify it as UDL. If they are different and varying gradually you can consider it as UVL and solve the problem.
  4. Oct 28, 2015 #3
    Thanks for your reply. The spar sees a distributed load -- the load diagram is a semi-ellipse. I approximated the distributed load as point loads. I'd like to know the formula to calculate the bending moment, e.g. F1 * d + F2 * 2d...
  5. Oct 28, 2015 #4
    You can refer this as a reference.

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