Torsional deformation and rotary driving characteristics of SMA thin strip

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Authors

  • H. Tobushi Department of Mechanical Engineering, Aichi Institute of Technology, Japan
  • E.A. Pieczyska Institute of Fundamental Technological Research, Polish Academy of Sciences, Poland
  • W.K. Nowacki Institute of Fundamental Technological Research, Polish Academy of Sciences, Poland
  • T. Sakuragi Aikoku Alpha Co., Japan
  • Y. Sugimoto Department of Mechanical Engineering, Aichi Institute of Technology, Japan

Abstract

The torsional deformation properties of a TiNi shape-memory alloy thin strip were investigated. The results obtained are summarized as follows. (1) The martensitic transformation starts at the edge of the thin strip. (2) The torsional deformation properties change slightly under thermomechanical cycling. (3) The fatigue life in pulsating torsion is longer than that in alternating torsion. (4) A simple rotary driving element can be developed by using the SMA thin strip.

Keywords:

shape memory alloy, thin strip, torsion, cyclic deformation, fatigue, rotary driving element