Application of silicon carbide fibers as a sensor for low-velocity impact detection and localization

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In this study, silicon carbide fiber was proposed as a sensor for detection and localization of low-velocity impacts on composite structures. Semi-conductive silicon carbide fibers have excellent piezoresistivity and good mechanical properties, so their potential as a sensor for low-velocity impact detection and localization was investigated by attaching it on the surface of a composite panel. By measuring the resistance change of the silicon carbide fiber sensor due to low-velocity impacts on the composite material, impacts signals were obtained, and the resistance changes of the silicon carbide fiber sensor were acquired by conversion to voltage using a Wheatstone bridge circuit. The impact signals acquired using the silicon carbide fiber sensors were investigated to analyze the repeatability for impacts at the same location point and impact distinguishability at different points. Finally, impact localization based on a reference database using the silicon carbide fiber sensors attached to the composite panel was performed, and a total of 20 impacts were localized with an average error of 16.2 mm and a maximum error of 39.5 mm for a test section with planar dimensions of 200 mm × 200 mm.
Publisher
SAGE PUBLICATIONS LTD
Issue Date
2019-11
Language
English
Article Type
Article
Citation

STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL, v.18, no.5-6, pp.1372 - 1382

ISSN
1475-9217
DOI
10.1177/1475921718810398
URI
http://hdl.handle.net/10203/267945
Appears in Collection
AE-Journal Papers(저널논문)
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