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Proceedings Paper

Monitoring of bolt clamping force at high temperatures using metal-packaged regenerated fiber Bragg grating strain sensors
Author(s): Yong-Kuo Huang; Yun Tu; Shan-Tung Tu
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Paper Abstract

Insufficient or excessive preload has been regarded as the main issue that may endanger the safety of bolted joints operated at high temperatures. A new technique for monitoring the bolt clamping force is thus proposed using metal-packaged regenerated fiber Bragg grating (RFBG) strain sensors spot-welded onto the bolt. The measurement of the clamping force in a bolted steel-steel joint subjected to thermal loading is conducted. The experimental results show that the bolt clamping force can be monitored by the metal-packaged RFBG strain sensor at high temperatures up to 500 °C. This technique provides a new possibility for structural health monitoring of bolted joints operated at high temperatures.

Paper Details

Date Published: 25 October 2017
PDF: 6 pages
Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 1046412 (25 October 2017); doi: 10.1117/12.2285022
Show Author Affiliations
Yong-Kuo Huang, East China Univ. of Science and Technology (China)
Yun Tu, East China Univ. of Science and Technology (China)
Shan-Tung Tu, East China Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 10464:
AOPC 2017: Fiber Optic Sensing and Optical Communications
Zi-Sen Zhao; Leping Wei; Yanbiao Liao; Weixu Zhang; Desheng Jiang; Wei Wang; Kenneth T. V. Grattan, Editor(s)

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