Crack detection in lap-joints using acoustic emission

Ian R. Searle; Steve M. Ziola; Paul S. Rutherford

doi:10.1117/12.207673

20 April 1995 Crack detection in lap-joints using acoustic emission

Ian R. Searle, Steve M. Ziola, Paul S. Rutherford

Proceedings Volume 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation; (1995) https://doi.org/10.1117/12.207673
Event: Smart Structures and Materials '95, 1995, San Diego, CA, United States

Abstract

Experiments have been conducted to assess the feasibility of autonomously detecting crack growth in an aircraft lap-joint using acoustic emission (AE) sensors. In a lap-joint the crack must be detected early and reliably so that a repair can be made at a reasonable cost, and unnecessary inspections can be eliminated. The location of the crack initiation is known to within a few fastener holes, making detection using AE possible. Representative waveforms from cracked lap-joint specimens, as well as results from a simpler specimen are presented. A method for distinguishing crack waveforms from fretting waveforms and noise sources is discussed. A self-organizing map is investigated as a means to identify crack signals. Lessons learned, and suggestions for future work are presented.

Citation Download Citation

Ian R. Searle, Steve M. Ziola, and Paul S. Rutherford "Crack detection in lap-joints using acoustic emission", Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); https://doi.org/10.1117/12.207673

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