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Study on Fe-Mn-Si Shape Memory Alloy Anti-Loosening Bolt

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Abstract:

A new type mechanism of anti-loosening bolt has been developed on the basis of the recovery characteristics of Fe-Mn-Si shape memory alloy. Based on that, Fe-Mn-Si shape memory alloy (SMA) anti-loosening bolt was processed, and its loose torque was increased by axial and radial restoring force generated in the process of heating. The anti-loosening experiment of the Fe-Mn-Si SMA bolt matching the common nut shows that the loose torque of pre-strain bolt increases with the increment of temperature, when the temperature is up to 500°C, the loose torque is 3 times than that of common bolt, which fits in with the characteristics of Fe-Mn-Si SMA phase transition; According to the failure criterion of fasteners, 80% decrease of loose torque, the vibration failure time of Fe-Mn-Si SMA bolt is 7 times than common bolt, so its anti-loosening effect is remarkable.

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Periodical:

Advanced Materials Research (Volume 900)

Pages:

78-82

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.900.78

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Online since:

February 2014

Authors:

Chao Yu Zhou, Cheng Xin Lin, Lin Lin Liu

Keywords:

Anti-Loosening Bolt, Fe-Mn-Si Shape Memory Alloy, Restoring Force

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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