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Proceedings Paper

Piezoelectric behavior of pre-stressed curved actuators under load
Author(s): Karla Mossi; Justin Costley; Zoubeida Ounaies; Robert Bryant
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Paper Abstract

Pre-stressed curved actuators typically consist of a piezoelectric ceramic (lead zirconate titanate or PZT) laminated between various layered materials. In one configuration, THUNDER, the bottom layer is stainless steel and the top layer is aluminum; the metallic layers are attached to the PZT ceramic using a polymeric adhesive. In another configuration, Lipca-C2, the layers comprise a glass/epoxy composite and a carbon/epoxy composite. Experimental and numerical results of displacement performance under unloaded conditions have been investigated in the past. The results show that the Lipca-C2 devices produced more displacement than the THUNDER devices when clamped and unloaded. The present study includes a comparative performance of both devices under load to evaluate their lifting capability. Both out-of-plane and in-plane displacements are assessed as a function of load and voltage at low frequency. A non-contact laser was used for the out-of-plane measurements simultaneously with an optic fiber for in-plane displacement at 0 to 5N load values. The load is attached to one end of the actuators, and to avoid possible damage to the actuators, it is moved through a mechanism that utilizes a frictionless linear bearing and a pulley.

Paper Details

Date Published: 21 July 2004
PDF: 10 pages
Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); doi: 10.1117/12.540026
Show Author Affiliations
Karla Mossi, Virginia Commonwealth Univ. (United States)
Justin Costley, Virginia Commonwealth Univ. (United States)
Zoubeida Ounaies, Virginia Commonwealth Univ. (United States)
Robert Bryant, NASA Langley Research Ctr. (United States)

Published in SPIE Proceedings Vol. 5387:
Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics
Dimitris C. Lagoudas, Editor(s)

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