Structural health monitoring using scanning laser vibrometry: III. Lamb waves for fatigue crack detection

WH Leong, WJ Staszewski, BC Lee, FL Scarpa

Research output: Contribution to journalArticle (Academic Journal)peer-review

130 Citations (Scopus)

Abstract

Guided ultrasonic waves have shown great potential for structural health monitoring. Various types of transducer can be used for actuating and sensing of these waves. This includes non-contact approaches such as optical/laser techniques. Classical laser methods usually involve high energy interferometers. The paper demonstrates that a commercial laser vibrometer, designed for vibration/modal analysis, can be used for crack detection in metallic structures. The study involves a simple fatigue test in order to initiate and grow a crack. Lamb waves generated by one bonded piezoceramic transducer were sensed using a multi-point scanning laser vibrometer. The results demonstrate the potential of laser vibrometry for simple, rapid and robust detection of fatigue cracks in metallic structures.
Translated title of the contributionStructural health monitoring using scanning laser vibrometry: III. Lamb waves for fatigue crack detection
Original languageEnglish
Pages (from-to)1387 - 1395
Number of pages9
JournalSmart Materials and Structures
Volume14(6)
DOIs
Publication statusPublished - Dec 2005

Bibliographical note

Publisher: Institute of Physics Publishing

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