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Doubling the thickness of a skin panel changes its effective width by a factor of

  • A.2
  • B.4
  • C.1.41
  • D.8

Answer: A

Effective width is directly proportional to thickness in the von Karman expression, so doubling the thickness doubles it. If the stress also changed the square root term would modify this, but at constant stress the relationship is simply linear.

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