Experimental Test and Numerical Simulation on the SMA Characteristics and Behaviors for Repeated Actuations

반복적인 작동을 위한 형상기억합금의 특성 실험과 거동 전산 모사

  • 김상헌 (서울대학교 대학원 기계항공공학부) ;
  • 조맹효 (서울대학교 기계항공공학부)
  • Published : 2007.03.01


In this study, we observe the application of shape memory alloy(SMA) into smart structures for repeatable actuation, because SMA changes its material properties and characteristics progressively under cyclic loading conditions and finally reaches stable path(state) after a certain number of stress/temperature loading-unloading cycles, so called 'training'. In this paper, SMA wires that have been in a stable state through the training are used. Stress-strain curve of the SMA wire at different temperature levels are measured. In addition, we observe other important effects such as the rate effect according to strain rates for rapid actuation response. The current work presents the experimental test using SMA wire after training completion by mechanical cycling. Through these tests, we measure the characteristics of SMA. With the estimated SMA properties and effects, we compare the experimental results with the simulation results based on the SMA constitutive equations.


Shape Memory Alloy;Behavior Stabilization;Training Effect;SMA Constitutive Equation


  1. Otsuka, K. and Wayman, C. M., 1999, 'Shape Memory Materials,' Cambridge University Press
  2. Kim, S., Choi, H., Yoon, M. and Cho, M., 2006, 'Experimental Test for Numerical Simulation SMA Characteristics and its Simulation, in: Smart Structures and Materials,' Proc. of SPIE, Vol. 6170, San Diego, USA
  3. Brinson L. C., 1993, 'One-dimensional Constitutive Behavior of Shape Memory Alloys : Thermomechanical Derivation with Non-constant Material Functions and Redefined Martensite Internal Variable,' J. Intelligent Mat. Syst. Struct ,Vol. 4, pp. 229-242
  4. Brinson L. C. and Lammering R., 1993, 'Finite Element Analysis of the Behavior of Shape Memory Alloys and Their Application', Int. J. Solids and Structures, Vol. 30, pp. 3261-3280
  5. Lagoudas, D. C., Bo, Z. and Qidwai, M. A., 1996, 'A Unified Thermodynamic Constitutive Model for SMA and Finite Element Analysis of Active Metal Matrix Composite,' Mechanics of Composite Materials and Structures, Vol. 3, pp. 153-179
  6. Cho, M. and Kim, S., 2005, ' Structural Morphing Using Two-way Shape Memory Effect of SMA,' Inter. J. Solids and Structures, Vol. 42, pp.1759-1776
  7. Iadicola, M. A. and Shaw, J. A., 2004, 'Rate and Thermal Sensitivities of Unstable Transformation Behavior in a Shape Memory Alloy,' Inter. J. Plasticity, Vol. 20, pp. 577-605
  8. Tanaka, K., Kobayashi, S. and Sato, Y., 1986, 'Thermomechanics of Transformation Pseudoelasticity and Shape Memory Effecct in Alloys,' Int. J Plasticity, Vol. 2, pp. 59-72
  9. Liang, C. and Rogers, C. A., 1992, 'Design of Shape Memory Alloy Actuators,' J. Mech. Design, Vol. 114, pp. 223-230
  10. Birman, V., 1997, 'Review of Mechanics of Shape Memory Alloy Structures,' Appl. Mech. Rev., Vol. 11, pp. 629-645
  11. Boyd, J. G. and Lagoudas, D. C., 1996, 'A Thermodynamic Constitutive Model for the Shape Memory Alloy Materials Part I, The Monolithic Shape Memory Alloy,' Inter. J. Plasticity, Vol. 12, pp. 805-842
  12. Shaw, J. A., 2000, 'Simulations of Localized Thermo-mechanical Behavior in a NiTi Shape Memory Alloy,' International Journal of Plasticity, Vol. 16, pp. 541-562
  13. Liang, C. and Rogers, C. A., 1990, 'One-Dimensional Thermomechanical Constitutive Relations for Shape Memory Materials,' J. Inteligent Mat. Syst. Struct., Vol. 1, pp. 207-234

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