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Proceedings Paper

FE modeling of multiple SMA wire actuated adaptive structures
Author(s): Nicole M. Lewis; Stefan Seelecke
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Paper Abstract

This paper presents a Finite Element Analysis (FEA) of an adaptive structure that uses multiple Shape Memory Alloy (SMA) wires for actuation. The commercially available FEA program ABAQUS was used to simulate the displacement of an adaptive nozzle structure which is actuated by controlling the power to six SMA wires simultaneously. The SMA wires were modeled within the user material (UMAT) feature using a mesoscopic free energy model [1] to accurately describe their thermomechanically coupled actuator behavior. During simulations, the required heat input, wire temperature, phase fraction changes, resulting strains, stresses, and the mechanical interactions with the structure were determined for each SMA wire. Second order effects of wire coupling were also observed and analyzed. The results from the simulation were compared with experimental measurements taken with the current adaptive nozzle prototype.

Paper Details

Date Published: 27 April 2011
PDF: 10 pages
Proc. SPIE 7978, Behavior and Mechanics of Multifunctional Materials and Composites 2011, 79781D (27 April 2011);
Show Author Affiliations
Nicole M. Lewis, North Carolina State Univ. (United States)
Stefan Seelecke, North Carolina State Univ. (United States)

Published in SPIE Proceedings Vol. 7978:
Behavior and Mechanics of Multifunctional Materials and Composites 2011
Zoubeida Ounaies; Stefan S. Seelecke, Editor(s)

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