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Proceedings Paper

Lamb wave interaction with structural defects: modeling and simulations
Author(s): B. C. Lee; Wieslaw J. Staszewski
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Paper Abstract

Lamb waves have shown to have a great potential for Structural Health Monitoring. The method uses acousto-ultrasonic waves propagating in plate-like structures. Structural damage can be identified by an amplitude change and/or mode conversion. However, previous studies show that the voltage amplitude from low-profile piezoceramic sensors can change due to temperature effects or additional vibration excitation. Also, pure Lamb wave modes may generate a variety of other modes by interacting with defects and/or by crossing different boundaries. Therefore simulation studies of wave propagation in structures is important for damage detection analysis. An application of the Local Interaction Simulation Approach (LISA) for Lamb wave interaction with defects is presented in this paper. The simulation results are validated using the experimental analysis. The method shows the potential for complex modeling of acousto-ultrasonic waves in damage detection applications.

Paper Details

Date Published: 1 August 2003
PDF: 10 pages
Proc. SPIE 5049, Smart Structures and Materials 2003: Modeling, Signal Processing, and Control, (1 August 2003); doi: 10.1117/12.482704
Show Author Affiliations
B. C. Lee, Sheffield Univ. (United Kingdom)
Wieslaw J. Staszewski, Sheffield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5049:
Smart Structures and Materials 2003: Modeling, Signal Processing, and Control
Ralph C. Smith, Editor(s)

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