Accession Number : ADA304292

Title :   Ferroelectric Ceramic/Polymer Bimorph Sensor for Strain Measurement in Laminates.

Descriptive Note : Interim rept. no. 1,

Corporate Author : UNIVERSITY COLL OF NORTH WALES BANGOR SCHOOL OF ELECTRONIC ENGINEERING AND CO MPUTER SYSTEMS

Personal Author(s) : Wenger, M. P. ; Das-Gupia, D. K.

PDF Url : ADA304292

Report Date : JAN 1996

Pagination or Media Count : 3

Abstract : Flexural (or bending) piezoelectricity of a piezoelectric monomorph film may be enhanced by bonding two or even a number of multiple poled films to form a bimorph or a multimorph. The compliance of ceramic/polymer composite is generally greater than piezoceramics. We have produced calcium modified lead titanate, PTCa/copolymer of vinylidene fluoride trifluoroethylene, P(VDF-TrFE) and PTCa/Epoxy composites and have successfiilly embedded such composite films in glass-laminate structure and detected acoustic emission signals. It is our objective now to produce bimorphs and multimorphs with these two different composite films of mixed (0-3 and 1-3) connectivity and provide surface bonded and embedded sensors to monitor strain in-situ and also to use them as ultrasonic transducers.

Descriptors :   *LAMINATES, *FLEXURAL PROPERTIES, *PIEZOELECTRIC TRANSDUCERS, POLYMERS, COMPOSITE MATERIALS, FILMS, COPOLYMERS, CERAMIC MATERIALS, ULTRASONICS, BONDED JOINTS, LEAD TITANATES, EMBEDDING, ACOUSTIC SIGNALS, EPOXY COMPOSITES, ACOUSTIC EMISSIONS, GREAT BRITAIN, POLYVINYLIDENES.

Subject Categories : Magnetic & Electric Fld Detection & Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE