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Proceedings Paper

Shape-memory-based multifunctional structural actuator panels
Author(s): Dana M. Elzey; Aarash Yusefzadeh Nagh Sofla; Haydn N. G. Wadley
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Paper Abstract

A multifunctional panel concept is presented in which a lightweight, structural sandwich panel is able to undergo a reversible change in shape upon application of a localized thermal stimulus. The shape change is effected by metallic shape memory face sheet elements, which employ a 'one-way' SM effect only. Unlike other designs, no external or bias forces are required to completed the full cycle of shape change. This is accomplished by a core design which, when one of the two face sheets is activated and thus undergoes a length change, forces the opposite face sheet to martensitically deform in tension. By alternately heating one face sheet and then the other, to transform the martensitic structure to austenite, the sandwich beam or panel is able to perform fully reversible cyclic shape changes. Heating can be accomplished electrically or by other means. The performance of the sandwich panel, in terms of required thermal power, actuation frequency, peak load bearing capacity, stiffness, and weight, can be optimized by proper selection of face sheet material and this thickness, the overall core thickness, core member thickness and length, and the design of the joint connecting cor membranes and face sheet.

Paper Details

Date Published: 9 July 2002
PDF: 9 pages
Proc. SPIE 4698, Smart Structures and Materials 2002: Industrial and Commercial Applications of Smart Structures Technologies, (9 July 2002); doi: 10.1117/12.475065
Show Author Affiliations
Dana M. Elzey, Univ. of Virginia (United States)
Aarash Yusefzadeh Nagh Sofla, Univ. of Virginia (United States)
Haydn N. G. Wadley, Univ. of Virginia (United States)

Published in SPIE Proceedings Vol. 4698:
Smart Structures and Materials 2002: Industrial and Commercial Applications of Smart Structures Technologies
Anna-Maria Rivas McGowan, Editor(s)

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