25 October 2017 Monitoring of bolt clamping force at high temperatures using metal-packaged regenerated fiber Bragg grating strain sensors
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Proceedings Volume 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications; 1046412 (2017) https://doi.org/10.1117/12.2285022
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
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.
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Yong-Kuo Huang, Yun Tu, Shan-Tung Tu, "Monitoring of bolt clamping force at high temperatures using metal-packaged regenerated fiber Bragg grating strain sensors", Proc. SPIE 10464, AOPC 2017: Fiber Optic Sensing and Optical Communications, 1046412 (25 October 2017); doi: 10.1117/12.2285022; https://doi.org/10.1117/12.2285022
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