Lagging for control of shape memory alloy actuator response time

Leary, M, Schiavone, F and Subic, A 2010, 'Lagging for control of shape memory alloy actuator response time', Materials & Design, vol. 31, no. 4, pp. 2124-2128.

Document type: Journal Article
Collection: Journal Articles

Title Lagging for control of shape memory alloy actuator response time
Author(s) Leary, M
Schiavone, F
Subic, A
Year 2010
Journal name Materials & Design
Volume number 31
Issue number 4
Start page 2124
End page 2128
Total pages 5
Publisher Elsevier Ltd
Abstract Shape memory alloys (SMA) are a particular class of materials that undergo a crystallographic transformation in the solid state. This effect can be utilised in the design of ultra-light mechanical actuators with significant environmental and economic benefits. Despite the advantages of SMA actuators, they are subject to a series of technical limitations, in particular, a relatively slow expansion rate, which typically occurs by free convective heat transfer to the ambient environment. Alternate heat transfer modes, including conduction and forced convection are more effective, but are not practical for typical applications. This article presents a novel method that enables significantly enhanced heat transfer in a practical and cost-effective manner. The novel method proposed in this work consists of lagging the SMA with a conductive material in order to manipulate the heat transfer rate. An experimental apparatus was developed to validate the proposed method.
Keyword(s) ambient environment
control of shape
convective heat transfer
crystallographic transformations
economic benefits
enhanced heat transfer
expansion rate
experimental apparatus
heat transfer rate
mechanical actuators
novel methods
response time
shape memory alloy
SMA actuators
technical limitations
typical application
DOI - identifier 10.1016/j.matdes.2009.10.010
Copyright notice © 2009 Elsevier Ltd
ISSN 0261-3069
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