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http://dx.doi.org/10.7234/kscm.2007.20.3.031

Quantitative Nondestructive Evaluation in Composite Beam Using Piezoelectric Transducers  

Lee, Sang-Hyoup (구미1대학 자동차산업계열)
Choi, Young-Geun (구미1대학 자동차산업계열)
Kim, Sang-Tae (영남대학교 기계공학부)
Publication Information
Composites Research / v.20, no.3, 2007 , pp. 31-36 More about this Journal
Abstract
A quantitative prediction method for initial crack length in a carbon/epoxy (CF/EP) composite beam using active piezoelectric transducers was established in this study. Wavelet Transform (WT)-based signal processing and identification technique in time-frequency domain was developed to facilitate the determination of damage presence and severity. Dynamic response of a CF/EP composites beam containing a continuously expanding crack, coupled with a pair of active piezoelectric disks, was examined under a narrow band excitation, and then applied with the proposed signal processing technique.
Keywords
Piezoelectric Transducer; Wavelet Transform; Non-Destructive Evaluation; Damage Detection; Finite Element Analysis;
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