546
Z. Shao et al.
Fig. 48.4 AE signal during helicopter tail beam loading test. a Signal in fixture friction and fiber
friction. b Signal in composite matrix deforms. c Crack initiation and propagation and interface
debonding. d Large number of fibers break and instability fracture
48.5 Conclusion
The acoustic emission signals gained in helicopter tail beam loading testing were be
analyzed by clustering analysis,the four types of signals gained, it was corresponding
to load of the helicopter tail beam loading testing, We can extracting signal features
of acoustic emission to judging the safety of helicopter composite tail beam.
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