Scattering of the fundamental anti-symmetric Lamb wave at delaminations in composite laminates

Ng, Ching-Tai and Veidt, Martin (2011) Scattering of the fundamental anti-symmetric Lamb wave at delaminations in composite laminates. Journal of the Acoustical Society of America, 129 3: 1288-1296. doi:10.1121/1.3533741

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Author Ng, Ching-Tai
Veidt, Martin
Title Scattering of the fundamental anti-symmetric Lamb wave at delaminations in composite laminates
Journal name Journal of the Acoustical Society of America   Check publisher's open access policy
ISSN 0001-4966
Publication date 2011-03-01
Year available 2011
Sub-type Article (original research)
DOI 10.1121/1.3533741
Open Access Status File (Publisher version)
Volume 129
Issue 3
Start page 1288
End page 1296
Total pages 9
Place of publication Melville, NY, United States
Publisher Melville, NY, United States
Language eng
Formatted abstract
An analysis of the scattering characteristics of the fundamental anti-symmetric (A0) Lamb wave at a delamination in a quasi-isotropic composite laminate is presented. Analytical solutions for this problem do not exist due to the anisotropic nature and multilayer characteristics of composite laminates. This study uses a three-dimensional finite element (FE) method and experimental measurements to provide physical insight into the scattering phenomena. Good agreement is found between simulations and experimental measurements. The results show that the A0 Lamb wave scattering at a delamination in composite laminates is much more complicated than the scattering at a defect in isotropic plates. Scatter amplitudes and scatter directivity distributions depend on the delamination size to wavelength ratio and the through-thickness location of the delamination damage. The study also investigates the feasibility of the common experimental practice of simulating delamination damage by bonding masses to the surface of composite laminates for guided wave damage detection and characterization methodologies verifications. The results suggest that care is required to use bonded masses to simulate delamination damage for verifying and optimizing damage characterization techniques. In summary, the results of the investigation help to further advance the use of the A0 Lamb wave for damage detection and characterization.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 39 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 51 times in Scopus Article | Citations
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