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Idealising a curved skin panel as flat is acceptable when

  • A.The radius is large compared with the panel dimensions
  • B.The panel is in tension only
  • C.The panel is made of composite material
  • D.The radius is small compared with the panel dimensions

Answer: A

Curvature raises a panel's buckling stress appreciably, so treating a strongly curved panel as flat is conservative but wasteful. Where the radius is large the difference is small and the simpler flat-panel methods apply.

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