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|Scopus||Web of Science®|
|Title:||Scattering characteristics of Lamb waves from debondings at structural features in composite laminates|
|Citation:||Journal of the Acoustical Society of America, 2012; 132(1):115-123|
|Publisher:||Acoustical Soc Amer Amer Inst Physics|
|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|
|Appears in Collections:||Civil and Environmental Engineering publications|
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