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Proceedings Paper

Shape memory alloy-based active chiral composite cells
Author(s): Maulik Prajapati; D. Roy Mahapatra
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Paper Abstract

Wing morphing is one of the emerging methodology towards improving aerodynamic efficiency of flight vehicle structures. In this paper a morphing structural element is designed and studied which has its origin in the well known chiral structures. The new aspect of design and functionality explored in this paper is that the chiral cell is actuated using thermal Shape Memory Alloy (SMA) actuator wires to provide directional motion. Such structure utilizes the potential of different actuations concepts based on actuator embedded in the chiral structure skin. This paper describes a new class of chiral cell structure with integrated SMA wire for actuation. Chiral topological constructs are obtained by considering passive and active load path decoupling and sub-optimal shape changes. Single cell of chiral honeycomb with actuators are analyzed using finite element simulation results and experiments. To this end, a multi-cell plan-form is characterized showing interesting possibilities in structural morphing applications. The applicability of the developed chiral cell to flexible wing skin, variable stiffness based design and controlling longitudinal-to-transverse stiffness ratio are discussed.

Paper Details

Date Published: 1 April 2014
PDF: 9 pages
Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90573C (1 April 2014); doi: 10.1117/12.2047329
Show Author Affiliations
Maulik Prajapati, Indian Institute of Science (India)
D. Roy Mahapatra, Indian Institute of Science (India)

Published in SPIE Proceedings Vol. 9057:
Active and Passive Smart Structures and Integrated Systems 2014
Wei-Hsin Liao, Editor(s)

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