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

doi:10.1117/12.850989

14 April 2010 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

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75221O (2010) https://doi.org/10.1117/12.850989
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

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.

Citation Download Citation

Tao Hua, Huimin Xie, Fulong Dai, Pengwan Chen, and Fenglei Huang "Study on the mechanical properties of TiNi shape memory alloy wires using mark shearing system", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75221O (14 April 2010); https://doi.org/10.1117/12.850989

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