Study on the mechanical properties of TiNi shape memory alloy wires using mark shearing system

Tao Hua, Huimin Xie*, Fulong Dai, Pengwan Chen, Fenglei Huang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The Shape memory alloys (SMAs) wires have been used for medical and engineering filed due to the shape memory effect and the superelasticity effect. It is necessary to measure the mechanical properties of the SMA wires accurately. In this paper the mechanical properties of the shape memory alloy wires with different diameters were studied by a self-made testing system. A loading apparatus driven by step motor was used to apply load, and a load cell with the accuracy of 10 mN and the capacity of 90N was used to measure the value of the load. An optical extensometer based on the mark shearing method was used to measure the strain of the SMA wires, which had accuracy with 5 micron-strains in strain measurement. The mechanical properties of the shape memory alloy wires were studied. The nominal stress-strain curves of the SMA wires were acquired. The superelasticity effect was also studied. The successful experimental results also demonstrated the feasibility of the system in silk-like specimen measurement.

Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
DOIs
Publication statusPublished - 2010
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: 18 Nov 200920 Nov 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7522
ISSN (Print)0277-786X

Conference

Conference4th International Conference on Experimental Mechanics
Country/TerritorySingapore
CitySingapore
Period18/11/0920/11/09

Keywords

  • Mechanical
  • Micro
  • Optical
  • SMA

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Hua, T., Xie, H., Dai, F., Chen, P., & Huang, F. (2010). Study on the mechanical properties of TiNi shape memory alloy wires using mark shearing system. In Fourth International Conference on Experimental Mechanics Article 75221O (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7522). https://doi.org/10.1117/12.850989