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Post-buckled skin is described as being in a diagonal tension field when

  • A.It has yielded across its whole width
  • B.It has separated from the stiffeners
  • C.It carries load as inclined tension bands
  • D.It carries pure compression

Answer: C

The panel gives up its shear stiffness on buckling but continues to carry load as a series of inclined straps. The uprights and flanges must then be sized for the inward pull those straps produce, which is a load case that would not exist otherwise.

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