13. New Technology Applications
Purpose of the program is to evaluate acoustic emission (AE) for in-flight detection of fatigue crack growth in aircraft structure. A special AE system was developed and installed on a RAAF Macchi jet trainer. It has been effectively measuring AE from a fatigue crack since August, 1978. Work is continuing to investigate correlation of AE data with crack growth.
Hutton, P. H. and Skorpik, James R., "Acoustic Emission Monitoring of In-Flight Crack Growth in Air Craft Structures" (1980). Proceedings of the DARPA/AFML Review of Progress in Quantitative NDE, July 1978–September 1979. 77.