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The purpose of this investigation was to determine the cause of the ultrasonic signal attenuation noted during an inspection of a composite aircraft component. Although ultrasonics was able to identify the location of the defective areas, destructive analysis had to be utilized to determine the exact nature of the defect. The investigation describes how cross-sectioning, fractography, and chemical analysis were utilized to determine the type of defect responsible for the signal attenuation.

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P.L. Stumpff, Damage Assessment in a Kevlar/Polyester Composite Component, ASM Failure Analysis Case Histories: Air and Spacecraft, ASM International, 2019,

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