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The effective width of a buckled panel decreases as

  • A.The stiffener spacing decreases
  • B.The stiffener stress increases
  • C.The panel thickness increases
  • D.The material's modulus increases

Answer: B

The von Karman expression makes the effective width vary inversely with the square root of the stress, so a more heavily loaded stiffener carries a narrower strip of working skin. The structure therefore becomes progressively less efficient as it approaches its ultimate load.

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