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http://dx.doi.org/10.5139/JKSAS.2004.32.7.051

Identification of Impact Damage in Smart Composite Laminates Using PVDF Sensor Signals  

Lee, Hong-Young (충남대학교 항공우주공학과 대학원)
Kim, In-Gul (충남대학교 항공우주공학과)
Park, Chan-Yik (국방과학연구소)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.32, no.7, 2004 , pp. 51-59 More about this Journal
Abstract
An experimental procedure to identify failure modes of impact damage using sensor signals and to analyze their general features is examined. A series of low-velocity impact tests from low energy to damage-induced high energy were performed on the instrumented drop weight impact tester to monitor the stress wave signals due to failure modes such as matrix cracking, delamination, and fiber breakage. The wavelet transform(WT) and Short Time Fourier Transform(STFT) are used to decompose the piezoelectric sensor signals in this study. The extent of the damage in each case was examined by means of a conventional ultrasonic C-scan. The PVDF sensor signals are shown to carry important information regarding the nature of the impact process that can be extracted from the careful signal processing and analysis.
Keywords
Low-velocity Impact; PVDF Sensor; Time-frequency Analysis; Structural Health Monitoring Technology;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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