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The crippling stress of a stiffener flange depends principally on

  • A.Width-to-thickness ratio and edge support
  • B.Its length only
  • C.The rivet diameter
  • D.The skin's shear modulus

Answer: A

A wide, thin flange with one free edge buckles at a much lower stress than a narrow one supported on both edges. Standard methods break the section into elements, assign each a crippling stress, and take an area-weighted average for the whole.

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