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Proceedings Paper

Effect of prestrain on the actuation performance of embedded shape memory alloy wires
Author(s): Conrad J. Doran
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Paper Abstract

Among the potential materials for embedded actuators in composite smart structures are shape memory alloys (SMA). They have the advantage of being relatively high authority actuators and can be drawn into wires which may be aligned with fibers in a host composite. Interest has been shown in their use in variable geometry aerofoils/hydrofoils and shape control of composite plates has already been investigated. Preliminary studies have also been completed to assess the use of SMA in active damage control. Although the results of these studies appear promising, the durability of the material has not been fully assessed. One aspect of durability which must be considered is the ability of the SMA wire to generate the same force each time it is actuated. The force depends on the amount by which the wire has been prestrained, and optimum prestrain will be that which produces the maximum repeatable force without creating damage in the host composite. This paper describes the results of an initial study of the effects of prestrain on the performance of embedded SMA wires under repeated actuation cycles.

Paper Details

Date Published: 13 September 1994
PDF: 4 pages
Proc. SPIE 2361, Second European Conference on Smart Structures and Materials, (13 September 1994); doi: 10.1117/12.184801
Show Author Affiliations
Conrad J. Doran, Defence Research Agency (United Kingdom)

Published in SPIE Proceedings Vol. 2361:
Second European Conference on Smart Structures and Materials
Alaster McDonach; Peter T. Gardiner; Ron S. McEwen; Brian Culshaw, Editor(s)

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