Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates

Ng, C. T., Veidt, M., Rose, L. R. F. and Wang, C. H. (2012) Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates. Journal of Sound and Vibration, 331 22: 4870-4883.


Author Ng, C. T.
Veidt, M.
Rose, L. R. F.
Wang, C. H.
Title Analytical and finite element prediction of Lamb wave scattering at delaminations in quasi-isotropic composite laminates
Journal name Journal of Sound and Vibration  (ERA 2012 Listed)    (ERA 2010 Rank A*)   Check publisher's open access policy
Publication date 2012-10
Sub-type Article
DOI 10.1016/j.jsv.2012.06.002
Volume number 331
Issue number 22
ISSN 0022-460X; 1095-8568
Start page 4870
End page 4883
Total pages 14
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2013
Language eng
Formatted 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.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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