Effect of prestrain on the actuation performance of embedded shape memory alloy wires

Conrad J. Doran

doi:10.1117/12.184801

13 September 1994 Effect of prestrain on the actuation performance of embedded shape memory alloy wires

Conrad J. Doran

Proceedings Volume 2361, Second European Conference on Smart Structures and Materials; (1994) https://doi.org/10.1117/12.184801
Event: Smart Structures and Materials: Second European Conference, 1994, Glasgow, United Kingdom

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.

Citation Download Citation

Conrad J. Doran "Effect of prestrain on the actuation performance of embedded shape memory alloy wires", Proc. SPIE 2361, Second European Conference on Smart Structures and Materials, (13 September 1994); https://doi.org/10.1117/12.184801

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