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Proceedings Paper

Crack detection in lap-joints using acoustic emission
Author(s): Ian R. Searle; Steve M. Ziola; Paul S. Rutherford
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Paper 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.

Paper Details

Date Published: 20 April 1995
PDF: 12 pages
Proc. SPIE 2444, Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation, (20 April 1995); doi: 10.1117/12.207673
Show Author Affiliations
Ian R. Searle, Boeing Defense & Space Group (United States)
Steve M. Ziola, Digital Wave Corp. (United States)
Paul S. Rutherford, Boeing Defense & Space Group (United States)

Published in SPIE Proceedings Vol. 2444:
Smart Structures and Materials 1995: Smart Sensing, Processing, and Instrumentation
William B. Spillman Jr., Editor(s)

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