| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7169549 | Engineering Fracture Mechanics | 2016 | 12 Pages |
Abstract
In 1989 a DC-10 aircraft crashed at the Sioux City, Iowa airport. The crash was the result of the catastrophic failure of the stage 1 fan rotor in the tail-mounted No. 2 engine due to fatigue cracking. No fatigue cracks had been detected over the 17Â year life of the aircraft, although 6 fluorescent penetrant inspections (FPIs) had been carried out during this time period. The NTSB attributed the failure to an undetected fatigue crack which emanated from a defect on the surface of the disk bore. In contrast, we have concluded that, because of high surface compressive residual stresses as the result of shot-peening and the presence of hard alpha, all fatigue cracking was sub-surface, and as such could not have been detected by FPI.
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Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
A.J. McEvily, S. Ishihara, Y. Mutoh,