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Type: Journal article
Title: Scattering characteristics of Lamb waves from debondings at structural features in composite laminates
Author: Ng, C.
Veidt, M.
Citation: Journal of the Acoustical Society of America, 2012; 132(1):115-123
Publisher: Acoustical Soc Amer Amer Inst Physics
Issue Date: 2012
ISSN: 0001-4966
Statement of
Ching-Tai Ng and Martin Veidt
Abstract: This article investigates the scattering characteristics of Lamb waves from a debonding at a structural feature in a composite laminate. This study specifically focuses on the use of the low frequency fundamental antisymmetric (A(0)) Lamb wave as the incident wave for debonding detection. Three-dimensional finite element (FE) simulations and experimental measurements are used to investigate the scattering phenomena. Good agreement is obtained between the FE simulations and experimental results. Detailed parameter studies are carried out to further investigate the relationship between the scattering amplitudes and debonding sizes. The results show that the amplitude of the scattered A(0) Lamb wave is sensitive to the debonding size, which indicates the potential of using the low frequency A(0) Lamb wave as the interrogating wave for debonding detection and monitoring. The findings of the study provide improved physical insights into the scattering phenomena, which are important to further advance damage detection techniques and optimize transducer networks.
Keywords: acoustic transducers; acoustic wave scattering; finite element analysis; laminates; structural acoustics; surface acoustic waves
Rights: © 2012 Acoustical Society of America
RMID: 0020120720
DOI: 10.1121/1.4728192
Appears in Collections:Civil and Environmental Engineering publications

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