The use of lamb waves in monitoring the development of sub-surface defects

W. K. Chiu, W. H. Ong, C. Doherty, Y. H. Teo

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review


In-situ monitoring methodology has often been touted as an effective means of assessing the integrity of aging aircraft structures. The propagative properties of Lamb wave have been demonstrated to be useful principle for in-situ structural health monitoring. Research has shown that Lamb wave can be used for the detection and monitoring of various damage types in metallic and composite structures. However most of these works focused on flat panels with little or no geometry changes. Recently, some work on the monitoring of fatigue crack growth of an Fill underwing skin with the implementation of a composite repair highlighted some issues. It appears that the changing geometry of the structural component and the Lamb wave modes does influence the detectability of subsurface crack developing on the underwing skin. This paper shall focus on the influence of Lamb wave modes on the detectability of sub-surface cracks on a structural component with geometry changes. Some experimental results shall be presented.

Original languageEnglish
Title of host publicationStructural Health Monitoring 2009: From System Integration to Autonomous Systems - Proceedings of the 7th International Workshop on Structural Health Monitoring, IWSHM 2009
PublisherDEStech Publications, Inc
Number of pages7
ISBN (Electronic)9781605950075
Publication statusPublished - 2009
EventInternational Workshop on Structural Health Monitoring (IWSHM) 2009 - Stanford, United States of America
Duration: 9 Sep 200911 Sep 2009
Conference number: 7th


ConferenceInternational Workshop on Structural Health Monitoring (IWSHM) 2009
Abbreviated titleIWSHM 2009
CountryUnited States of America

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