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Discussion

Which of these is NOT covered by the scatter factor on demonstrated fatigue life?

  • A.Differences between the test spectrum and real usage
  • B.Manufacturing variation between airframes
  • C.Errors in the static strength analysis
  • D.Material property variation across the fleet

Answer: C

Static strength is demonstrated separately and has its own factors. The scatter factor addresses the variability inherent in fatigue itself, where nominally identical specimens can differ in life by an order of magnitude.

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