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   Check publisher's open access policy
ISSN 0022-460X
1095-8568
Publication date 2012-10
Sub-type Article (original research)
DOI 10.1016/j.jsv.2012.06.002
Volume 331
Issue 22
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 (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2013 Collection
 
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