Fatigue-induced disbonds in adhesive lap splices of aluminum and their ultrasonic detection

David K. Hsu; Thadd C. Patton; Heshmat A. Aglan; S. Shroff

doi:10.1117/12.163850

3 December 1993 Fatigue-induced disbonds in adhesive lap splices of aluminum and their ultrasonic detection

David K. Hsu, Thadd C. Patton, Heshmat A. Aglan, S. Shroff

Proceedings Volume 2001, Nondestructive Inspection of Aging Aircraft; (1993) https://doi.org/10.1117/12.163850
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

This paper describes an experimental study of inducing disbonds in adhesively bonded aluminum lap splices by flexural fatigue and the use of ultrasonic methods for detecting such disbonds.Disbonds were imaged using focused beams of high frequency (15MHz) and low frequency (1 MHz) ultrasound. Detectability of disbonds above and below scrim cloth in the adhesive bond was investigated. Ultrasonic NDE results were compared with optical edge-on observations of disbond propagation during mechanical testing and also to other NDE methods such as thermal wave imaging and electronic speckle pattern interferometry. Methods for exploiting focused ultrasonic beam for inspection are discussed.

Citation Download Citation

David K. Hsu, Thadd C. Patton, Heshmat A. Aglan, and S. Shroff "Fatigue-induced disbonds in adhesive lap splices of aluminum and their ultrasonic detection", Proc. SPIE 2001, Nondestructive Inspection of Aging Aircraft, (3 December 1993); https://doi.org/10.1117/12.163850

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