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A simple smart wing actuator using Ni-Ti SMA

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Abstract

One way shape memory effect (SME) is not sufficient in the application of the automatic repeated actuation of the SMA wire because the actuator using SME cannot return to its initial shape after it cools down. In the present study, the two-way SME under residual stress is considered. An actuator using the two-way effect of SMA returns to its initial shape by increasing or decreasing the temperature of SMA under initial residual stress. Using the two-way effect, we manufactured a simple smart wing actuator which consists of the SMA wire and a torsional spring to induce variable residual stresses. The SMA wire after the specific training procedure in order for the actuator to be used for the repeated actuations without performance deteriorations in the specified actuation requirements was used. The simple smart wing actuator has been tested for repeated actuations in still-air as an environmental thermal condition for the practical aspect of its usage. The characteristics of actuator behavior according to operation thermal cycle duration time, i.e., the response characteristics for rapid actuation were investigated. By the application of the simple smart wing actuator using the SMA wire, SMA shows novel performance in repeated actuations.

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Authors and Affiliations

  1. Technical Research Laboratories, POSCO, Gwangyang-si, 545-090, Korea

    Sanghaun Kim

  2. WCU Multiscale Mechanical Design Divison, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea

    Maenghyo Cho

Authors
  1. Sanghaun Kim
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  2. Maenghyo Cho
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Additional information

This paper was recommended for publication in revised form by Associate Editor Jeong Sam Han

Maenghyo Cho received a Ph. D degree from the University of Washington in 1993. He is currently Professor at School of Mechanical & Aerospace Engineering at Seoul National University, Seoul, Korea. His research interests are multiscale/nano mechanics including MD and DFT simulations and Computational solid/structural mechanics. Researcher

Sanghaun Kim received a Ph. D degree of Mechanical & Aerospace Engineering from Seoul National University. He is currently senior researcher at Auto Steel Application Group in POSCO. His research interest is on developing constitutive equations to simulate nonlinear deformation behavior of smart materials such as shape memory alloy.

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Kim, S., Cho, M. A simple smart wing actuator using Ni-Ti SMA. J Mech Sci Technol 24, 1865–1873 (2010). https://doi.org/10.1007/s12206-010-0609-8

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  • DOI: https://doi.org/10.1007/s12206-010-0609-8

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