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A designer specifies an unsymmetric laminate for a wing skin. The likely consequence is

  • A.No consequence at all
  • B.The panel becomes quasi-isotropic
  • C.The panel warps on cure and bends in service
  • D.The panel is stronger in tension

Answer: C

Extension-bending coupling makes an unsymmetric laminate distort as it cools and again as it is loaded, neither of which a skin holding an aerodynamic contour can tolerate. Symmetry is essentially mandatory for such a part.

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