STP1353

    Practical AE Methodology for Use on Aircraft

    Published: Jan 1999


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    Abstract

    The first production use of practical acoustic emission (AE) on aircraft was on the F-111, where more than 240 U.S. and Australian aircraft have been successfully monitored during cold proof testing since 1987. A key factor was the design of an instrument which automatically configured itself at power-on, so that aircraft testing could take place in a highly efficient and reliable manner. The second production use of AE on aircraft was on the VC-10, where an entire fleet of 22 aircraft was monitored 40 times during pneumatic proof pressurization. The monitoring of this large transport required anywhere from 282 to 313 narrowband AE sensors per aircraft. In both aircraft types, numerous significant defects were discovered through AE-based nondestructive testing. Finally, we present on-going in-flight AE research. This new research uses digital waveform processing of wideband AE signals and offers the potential of adding new and complementary capabilities to classical, narrowband AE.

    Keywords:

    acoustic emission, aging aircraft, nondestructive testing, signal, processing, global defect detection, proof testing


    Author Information:

    Carlyle, JM
    Chief Scientist, Carlyle Consulting, Yardley, PA

    Bodine, HL
    Martingale Research Corp., Richardson, TX

    Henley, SS
    Martingale Research Corp., Richardson, TX

    Dawes, RL
    Martingale Research Corp., Richardson, TX

    Demeski, R
    Embry-Riddle Aeronautical University, Daytona Beach, FL

    Hill, EvK
    Embry-Riddle Aeronautical University, Daytona Beach, FL


    Paper ID: STP15789S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP15789S


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