Demonstration of Acoustic Emission System for Damage Monitoring of Full Scale Metallic Aircraft Structures During Fatigue Testing
Final rept. Aug 1976-Jul 1977
GRUMMAN AEROSPACE CORP BETHPAGE NY
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This report describes the acoustic emission monitoring work performed on a full scale metallic aircraft wing carry through structure of the swing wing bomber type. The structure was monitored during fatigue testing with a Grumman developed system. The program was designed to prove the feasibility of using a real time acoustic emission monitoring system to detect and locate crack propagation in a full scale complex airframe structure during fatigue cycling. The report includes a description of the Acoustic Emission System operation and the concepts of noise discrimination used on fatigue tests. The installation and monitoring techniques used on the fatigue test are described. The test results, the problems associated with monitoring the complex structure, the conclusions, and system monitoring recommendations are also discussed in this report.