
Proceedings Paper
Electro-mechanical behavior of a shape memory alloy actuatorFormat | Member Price | Non-Member Price |
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Paper Abstract
This paper presents experimental study and numerical simulation of the electro-thermo-mechanical behavior of a
commercially available Flexinol shape memory alloy (SMA) wire [1]. Recently, a novel driver device has been
presented [2], which simultaneously controls electric power and measures resistance of an SMA wire actuator. This
application of a single wire as both actuator and sensor will fully exploit the multifunctional nature of SMA materials
and minimize system complexity by avoiding extra sensors. Though the subject is not new [3-6], comprehensive
resistance data under controlled conditions for time-resolved and hysteresis-based experiments is not readily available
from the literature.
A simple experimental setup consisting of a Flexinol wire mounted in series with the tip of a compliant cantilever
beam is used to systematically study the SMA behavior. A Labview-based data acquisition system measures actuator
displacement and SMA wire stress and resistance and controls the power passed through the SMA actuator wire. The
experimental setup is carefully insulated from ambient conditions, as the thermal response of a 50-micron diameter
Flexinol wire is extremely sensitive to temperature fluctuation due to convective heat transfer.
Actuator performance is reported for a range of actuation frequencies and input power levels. The effect of varying
actuator pre-stress is reported as well. All of the experimental data is compared with simulated behavior that is derived
from a numerical model for SMA material [7-10].
Paper Details
Date Published: 31 March 2009
PDF: 10 pages
Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 72890T (31 March 2009); doi: 10.1117/12.817010
Published in SPIE Proceedings Vol. 7289:
Behavior and Mechanics of Multifunctional Materials and Composites 2009
Zoubeida Ounaies; Jiangyu Li, Editor(s)
PDF: 10 pages
Proc. SPIE 7289, Behavior and Mechanics of Multifunctional Materials and Composites 2009, 72890T (31 March 2009); doi: 10.1117/12.817010
Show Author Affiliations
Matthew E. Pausley, North Carolina State Univ. (United States)
Stephen J. Furst, North Carolina State Univ. (United States)
Stephen J. Furst, North Carolina State Univ. (United States)
Vamsi Talla, North Carolina State Univ. (United States)
Indian Institute of Technology (India)
Stefan Seelecke, North Carolina State Univ. (United States)
Indian Institute of Technology (India)
Stefan Seelecke, North Carolina State Univ. (United States)
Published in SPIE Proceedings Vol. 7289:
Behavior and Mechanics of Multifunctional Materials and Composites 2009
Zoubeida Ounaies; Jiangyu Li, Editor(s)
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