Journal of Mechanical Science and Technology

, Volume 24, Issue 9, pp 1865–1873 | Cite as

A simple smart wing actuator using Ni-Ti SMA

  • Sanghaun Kim
  • Maenghyo Cho
Article

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.

Keywords

SMA Residual stress Two-way SME Thermal cycle time Actuator 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    K. Otsuka and C.M. Wayman, Shape Memory Materials, Cambridge University Press, UK (1999).Google Scholar
  2. [2]
    T. Waram, Actuator Design Using Shape Memory Alloys, Second Ed. Mondotronics Inc., UK (1993).Google Scholar
  3. [3]
    V. Birman, Review of mechanics of shape memory alloy structures, Appl. Mech. Rev., 11 (1997) 629–645.CrossRefMathSciNetGoogle Scholar
  4. [4]
    S. Kim, H. Choi, M. Yoon and M. Cho, Experimental test for numerical simulation SMA characteristics and its simulation, in: Smart Structures and Materials, Proc. of SPIE, 6170, San Diego, USA (2006).Google Scholar
  5. [5]
    B. Erbstoeszer, B. Armstrong, M. Taya and K. Inoue, Stabilization of the shape memory effect in NiTi: An experimental investigation, Scripta Mater., 42 (2000) 1145–1150.CrossRefGoogle Scholar
  6. [6]
    H. Scherngell and A. C. Kneissl, Training and stability of the Intrinsic two-way shape memory effect in Ni-Ti alloys, Scripta Mater., 39 (1998) 205–212.CrossRefGoogle Scholar
  7. [7]
    H. Tobushi, Y. Shimeno, T. Hachisuka and K. Tanaka, In fluence of strain rate on superelastic properties of NiTi shape memory alloy, Mechanics of Materials, 30 (1998) 141–150.CrossRefGoogle Scholar
  8. [8]
    H. C. Lin, S. K. Wu and J. C. Lin, The martensitic transformation in Ti-rich TiNi shape memory alloys, Materials Chemistry and Physics, 37 (1994) 184–190.CrossRefGoogle Scholar
  9. [9]
    Y. Liu and P. G. McCormick, Factors Influencing the Development of Two-Way Shape Memory in NiTi, Acta Metallurgica et Materialia, 38(7) (1990) 1321–1326.CrossRefGoogle Scholar
  10. [10]
    M. Cho and S. Kim, Structural morphing using two-way shape memory effect of SMA, Int. J. Solids and Struc., 42 (2005) 1759–1776.MATHCrossRefGoogle Scholar
  11. [11]
    S. Kim and M. Cho, Numerical simulation of double SMA wire actuator using two-way shape memory effect of SMA, Smart Mater. Struc., 16 (2007) 372–381.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Sanghaun Kim
    • 1
  • Maenghyo Cho
    • 2
  1. 1.Technical Research LaboratoriesPOSCOGwangyang-siKorea
  2. 2.WCU Multiscale Mechanical Design Divison, School of Mechanical and Aerospace EngineeringSeoul National UniversitySeoulKorea

Personalised recommendations