Flexible ultrasonic transducers for structural heath monitoring of Graphite/Epoxy composite

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DOIResolve DOI: http://doi.org/10.1117/12.848863
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Proceedings titleProceedings of SPIE
ConferenceSmart Sensor Phenomena, Technology, Networks, and Systems 2010, 2010-03-08, Seattle, Washington, USA
AbstractFlexible ultrasonic transducers (FUTs) are presented for structural health monitoring (SHM) and non-destructive evaluation (NDE) of graphite/epoxy (Gr/Ep) composites. These FUTs are fabricated using a sol-gel spray technique to coat piezoelectric films onto 75 m thick titatanium (Ti) or 50 m thick polymide (Pl) membranes. The main merit of FUTs is their on-site installation capability because they may be glued or attached to a host Gr/Ep structure with planar or curved surfaces. The flexibility of such FUTs is achieved due to the thin substrates, piezoelectric ceramics and electrodes. Tapered Gr/Ep layers bonded onto each side of an aluminum (Al) plate and on a Gr/Ep composite plate with artificial delaminations were investigated. An induction type non-contact method for the evaluation of Gr/EP composites using FUTs is also demonstrated. Such a non-contact technique may be desired for SHM and NDE of rotating composite components.
Publication date
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number52458
NPARC number16891220
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Record identifier7126dca0-23b8-403d-8277-cd8f0b72e55b
Record created2011-02-20
Record modified2016-05-09
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