Quantitative nondestructive evaluation in composites beam using piezoelectrics

Young Geun Choi, Zhongqing Su, Zuo Rong Chen, Lin Ye

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review


A quantitative prediction method for initial crack length in a carbon fibre/epoxy (CF/EP) composites beam using active piezoelectric transducers was established in this study. Wavelet Transform (WT)-based signal processing and identification teclmique in time-frequency domain was developed to facilitate the determination of damage presence and severity. Dynamic response of a CFIEP composites beam containing a continuously expanding crack, coupled with a pair of active piezoelectric disks, was examined under a narrowband excitation, and then applied with the proposed signal processing technique.
Original languageEnglish
Title of host publicationComposites Technologies For 2020
PublisherWoodhead Publishing Limited
Number of pages6
ISBN (Print)9781855738317
Publication statusPublished - 1 Jan 2004
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)


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