Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 69, Issue 15-16, Pages 2507-2513Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2009.07.002
Keywords
Functional composites; Smart materials; Electrical properties; Nondestructive testing; Wireless
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Wireless structural health monitoring (SHM) techniques generally rely on the integration of sensors, transmitters, and antennas into structures; however, the ideal solution would entail the material itself acting as a monitoring system. The current work investigates the application of antenna/sensing multifunctional composites. In this technique, carbon fiber reinforced plastic (CFRP) structures are modeled as half-wavelength dipole antennas. The electrical or antenna property varies in accordance with damage occurrence and can be monitored wirelessly at a remote location. The feasibility of wireless SHM using the self-sensing antenna technique is investigated analytically and experimentally using unidirectional CFRP laminates and rotor blades of woven CFRP. The CFRP radiates radio energy well when it is used as a half-wavelength dipole antenna, and damages to the CFRP can be wirelessly detected by monitoring an increase in the resonant frequency of the CFRP antenna. (C) 2009 Elsevier Ltd. All rights reserved.
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