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Proceedings Paper

Mechanical properties of compliant piezoelectric composites
Author(s): Steven P. Marra; Kaliat T. Ramesh; Andrew S. Douglas
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Paper Abstract

The potential applications of pure piezoelectric ceramics as embedded sensors are limited by the stiffness and brittleness of these materials. To achieve a more compliant sensor, composites have been developed which incorporate calcium-modified lead titanate particles in an polymer matrix. Such compliant sensors, in thin film form, may be useful within thick composite structures such as tank hulls and helicopter blades. The mechanical response of 0 - 3 composite films of Ca-modified lead titanate in polyvinylidene fluoride-trifluoroethylene and Epon828 epoxy matrices is investigated in this work. The electrical response of these composites is currently being studied by Wenger et al. The viscoelastic properties of these thin film composites with various volume fractions have been measured over a wide range of frequencies and temperatures. The observed mechanical response of these heterogeneous materials is compared with the predictions of several simple models for such composites. Preliminary piezoelectric results are also presented.

Paper Details

Date Published: 14 February 1997
PDF: 12 pages
Proc. SPIE 3040, Smart Structures and Materials 1997: Smart Materials Technologies, (14 February 1997); doi: 10.1117/12.267108
Show Author Affiliations
Steven P. Marra, Johns Hopkins Univ. (United States)
Kaliat T. Ramesh, Johns Hopkins Univ. (United States)
Andrew S. Douglas, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 3040:
Smart Structures and Materials 1997: Smart Materials Technologies
Wilbur C. Simmons; Ilhan A. Aksay; Dryver R. Huston, Editor(s)

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