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Type: Journal article
Title: Influence of stacking sequence on scattering characteristics of the fundamental anti-symmetric Lamb wave at through holes in composite laminates
Author: Veidt, M.
Ng, C.
Citation: Journal of the Acoustical Society of America, 2011; 129(3):1280-1287
Publisher: Acoustical Soc Amer Amer Inst Physics
Issue Date: 2011
ISSN: 0001-4966
Statement of
Martin Veidt and Ching-Tai Ng
Abstract: This paper investigates the scattering characteristics of the fundamental anti-symmetric (A(0)) Lamb wave at through holes in composite laminates. Three-dimensional (3D) finite element (FE) simulations and experimental measurements are used to study the physical phenomenon. Unidirectional, bidirectional, and quasi-isotropic composite laminates are considered in the study. The influence of different hole diameter to wavelength aspect ratios and different stacking sequences on wave scattering characteristics are investigated. The results show that amplitudes and directivity distribution of the scattered Lamb wave depend on these parameters. In the case of quasi-isotropic composite laminates, the scattering directivity patterns are dominated by the fiber orientation of the outer layers and are quite different for composite laminates with the same number of laminae but different stacking sequence. The study provides improved physical insight into the scattering phenomena at through holes in composite laminates, which is essential to develop, validate, and optimize guided wave damage detection and characterization techniques.
Keywords: Epoxy Compounds; Reproducibility of Results; Finite Element Analysis; Acoustics; Porosity; Scattering, Radiation; Models, Theoretical; Time Factors; Computer Simulation; Numerical Analysis, Computer-Assisted
Rights: © 2011 Acoustical Society of America
RMID: 0020110307
DOI: 10.1121/1.3533742
Grant ID:
Appears in Collections:Civil and Environmental Engineering publications

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