High-Frequency Response Functions for Composite Plate Monitoring with Ultrasonic Validation

Autor:	Gyuhae Park, Amanda C. Rutherford, Jeanneette R. Wait, Charles R. Farrar, Brett Nadler, Thomas N. Claytor
Rok vydání:	2005
Předmět:	Frequency response Materials science business.industry Piezoelectric sensor Acoustics Ultrasonic testing Delamination Aerospace Engineering Structural engineering Vibration Lamb waves Composite plate Ultrasonic sensor business
Zdroj:	AIAA Journal. 43:2431-2437
ISSN:	1533-385X 0001-1452
DOI:	10.2514/1.14305
Popis:	In this study, frequency response functions (FRF) measured by piezoelectric Macro-Fiber Composite (MFC) actuators/sensors are used to detect subsurface delamination in a composite plate. The plate is impacted to seed damage in the form of ply delamination. Then, the MFCbased active-sensing system exerts an excitation into the plate, and measures the subsequent responses. Traditional piezoceramic materials are also mounted in comparable locations on the plate to compare their performances. FRF and damage indicator features are derived from the measured signals and used to assess the condition of the plate. Validation of the delamination is completed using an ultrasonic C-scan method. The effective area of observed damage is well correlated to the damage indicator feature.
Databáze:	OpenAIRE
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