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Assessment of delamination in composite beams using shear horizontal (SH) wave mode

journal contribution
posted on 2007-02-01, 00:00 authored by Z Su, Chunhui Yang, N Pan, L Ye, L M Zhou
Interaction of Lamb waves with structural damage can lead to wave mode conversion. In this study, the shear horizontal (SH) wave, from the mode conversion of the fundamental symmetric Lamb wave (S0), was used for quantitative identification of delamination in composite beams, based on advanced signal processing using an inverse approach. SH wave propagation under various delamination conditions in CF/EP beams made of orthotropic plain woven fabrics was simulated, and signal characteristics were extracted in terms of the concept of digital damage fingerprints (DDF). With the aid of an artificial neural algorithm, the relation between the DDF of delamination-scattered SH mode and damage parameters was calibrated, whereby the occurrence, location and size of delamination in the composite beams were assessed. The approach was experimentally validated, and the results demonstrate the effectiveness of SH mode for quantitative damage evaluation of composite structures.

History

Journal

Composites science and technology

Volume

67

Issue

2

Pagination

244 - 251

Publisher

Elsevier Ltd

Location

Amsterdam, The Netherlands

ISSN

0266-3538

eISSN

1879-1050

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2006, Elsevier Ltd

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