Constitutive model for shape memory alloy torsion actuator

Bo Zhou, Jin Song Leng, Guang Ping Zou, Yan Ju Liu, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Shape memory alloy (SMA) torsion actuator is one of the key approaches realizing adaptive wings in airplanes. In this paper, the actuator is made up of SMA wires and a thin-walled tube, in which the SMA wires are twisted and affixed around the surface of the tube at an angle referenced to the center axis of the tube. A thermo-mechanical constitutive model is developed to predict the thermo-mechanical behaviors of the SMA torsion actuator based on the knowledge of solid mechanics. The relationship between the torsion-angle and temperature is numerically calculated by using the thermo-mechanical constitutive model coupled with the SMA phase transformation model developed by Zhou and Yoon. The numerical results are compared with the relative experimental results finished by Xiong and Shen. Influences of the twist-angle of SMA wires and geometrical factors on the primary actuation performances of the SMA torsion actuator are also numerically investigated based on the thermo-mechanical constitutive model coupled with the SMA phase transformation model developed by Zhou and Yoon. Results show that the thermo-mechanical constitutive model can well predict the thermo-mechanical behaviors of the SMA torsion actuator.
Original languageEnglish
Pages (from-to)278-282
Number of pages5
JournalJournal of Harbin Institute of Technology (New Series)
Volume17
Issue number2
Publication statusPublished - 1 Apr 2010

Keywords

  • Shape memory alloy
  • Thermo-mechanical constitutive model
  • Torsion actuator

ASJC Scopus subject areas

  • Engineering(all)

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