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|Type: ||Journal article|
|Title: ||Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates|
|Author: ||Ng, Ching-Tai|
Rose, L. R. F.
Wang, Chun Hui
|Citation: ||Journal of Sound and Vibration, 2012; 331(22):4870-4883|
|Publisher: ||Academic Press Ltd Elsevier Science Ltd|
|Issue Date: ||2012|
|School/Discipline: ||School of Civil, Environmental and Mining Engineering|
|C.T. Ng, M. Veidt, L.R.F. Rose, C.H. Wang|
|Abstract: ||This paper presents a theoretical and finite element (FE) investigation of the scattering characteristics of the fundamental anti-symmetric (A0) Lamb wave at delaminations in a quasi-isotropic (QI) composite laminate. Analytical models based on the Mindlin plate theory and Born approximation are presented to predict the A0 Lamb wave scattering at a delamination, which is modelled as an inhomogeneity, in an equivalent isotropic model of the QI composite laminate. The results are compared with FE predictions, in which the delamination is modelled as a volume split. The equivalent isotropic model and QI composite laminate are used to investigate the feasibility of the common theoretical approach of modelling the delamination as the inhomogeneity. A good correlation is observed between the theoretical solutions and FE results in the forward scattering amplitudes, but there exists a larger discrepancy in the backward scattering amplitudes. The FE results also show that the fibre direction of the outer laminae has a pronounced influence on the forward and backward scattering amplitudes, which is not predicted by the analytical models.|
|Rights: ||Copyright © 2012 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Civil and Environmental Engineering publications|
|View citing articles in: ||Web of Science|
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