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Proceedings Paper

Shape memory alloy post buckled precompressed (SMAPBP) actuator concepts and theory
Author(s): Thomas Sinn; Ronald Barrett
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Paper Abstract

This paper discusses the modeling, design and performance of SMA actuated Post-Buckled Precompressed (PBP) plates. The paper begins with an outline of past approaches to PBP actuation and control which have mostly been centered on piezoelectric actuators. To skirt problems associated with tensile failure on convex faces of PBP actuators, SMA filaments are used. Because SMA's are far less sensitive to tensile failure, far greater deflections and work outputs are both predicted and experimentally measured. Unlike conventional SMA actuated plates, the total moment generation capability and deflections can be simultaneously amplified, indicating a substantial increase in total work output. Experiments showed that the SMA actuators are capable of tip deflection of up to 45° and that the Post-Buckled Precompressed Mechanism improves tip rotation up to 40% compared to conventional antagonistically actuated SMA plates.

Paper Details

Date Published: 9 April 2010
PDF: 9 pages
Proc. SPIE 7643, Active and Passive Smart Structures and Integrated Systems 2010, 764308 (9 April 2010); doi: 10.1117/12.847561
Show Author Affiliations
Thomas Sinn, The Univ. of Kansas (United States)
Ronald Barrett, The Univ. of Kansas (United States)

Published in SPIE Proceedings Vol. 7643:
Active and Passive Smart Structures and Integrated Systems 2010
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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