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The idealisation of skin as shear-carrying only is least accurate when

  • A.The skin is thick against the stringers
  • B.The skin is very thin
  • C.The stringers are closely spaced
  • D.The section is symmetric

Answer: A

The assumption depends on the stringers holding most of the direct-stress-carrying area. Where the skin is thick enough to carry a substantial share, lumping it into booms distorts the distribution and a fuller model is needed.

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