A New Structural Health Monitoring System for Composite Plate

Nai Zhi Zhao; Shi Yan

doi:10.4028/www.scientific.net/AMR.183-185.406

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 183-185A New Structural Health Monitoring System for...

A New Structural Health Monitoring System for Composite Plate

Abstract:

Damage detection in composite materials can be divided into active and passive approaches. The active approach is usually based on various non-destructive techniques utilizing actuators and/or receivers. Simple laser scans, revealing the change in Lamb wave response amplitudes, have been used to locate delamination and estimate its severity in a composite plate. The validity of the proposed method is demonstrated through experimental studies in which input signals exerted at piezoelectric (PZT) patches on a composite plate are successfully reconstructed by using the time reversal method. The ultimate goal of this study is to develop a reference-free damage diagnosis technique based on the time reversal process so that defects can be identified without relying on any past baseline data.

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Periodical:

Advanced Materials Research (Volumes 183-185)

Pages:

406-410

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.183-185.406

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Online since:

January 2011

Authors:

Nai Zhi Zhao, Shi Yan

Keywords:

Damage Detection, Lamb Wave, Piezoelectric Wafer, Time Reversal, Wavelet Transform (WT)

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