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Proceedings Paper

Deflection-voltage performance of asymmetrically activated piezoelectric C-block actuators
Author(s): Diann E. Brei; James D. Ervin; Andrew J. Moskalik
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Paper Abstract

As the field of smart materials and structures emerges, there is an increasing need for high- force, high-displacement actuators. An actuator architecture that shows potential in meeting this need is the C-block. C-blocks are curved piezoelectric laminated beams, poled in the radial direction, that flex when voltage is applied. One of the main advantages of C-blocks is they can be combined into distributed arrays to generate more force and/or deflection. The original C-block design was a polymeric bimorph and required the piezoelectric layers to experience both tension and compression. Unfortunately, ceramic versions of the actuator would fail as a result of the tensile stress. Therefore, the C-block design has been modified to an asymmetrically loaded unimorph. This paper introduces a ceramic C-block actuator design along with a simple model for deflection-voltage performance. To verify the model, piezoelectric polymeric and ceramic C-block prototypes were fabricated and deflection-voltage experiments were performed. These experiments demonstrate that the model predicts well the performance of asymmetric C-blocks. The model may be used to design a variety of C-block actuators, potentially including a high-force, high displacement actuator for smart structures applications.

Paper Details

Date Published: 1 May 1996
PDF: 11 pages
Proc. SPIE 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems, (1 May 1996); doi: 10.1117/12.239031
Show Author Affiliations
Diann E. Brei, Univ. of Michigan (United States)
James D. Ervin, Univ. of Michigan (United States)
Andrew J. Moskalik, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 2717:
Smart Structures and Materials 1996: Smart Structures and Integrated Systems
Inderjit Chopra, Editor(s)

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