27 March 2018 Quantitative monitoring of hole-edge damage growth using eddy current array sensor-based intelligent bolt
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Abstract
Hole-edge damage of joint structure is one type of the most closely watched damages for ultrahigh buildings, bridges, aircrafts, etc., due to stress concentration at the bolt hole and complex load conditions. This paper employs an eddy current array sensor, made by flexible printed circuit technology, bonded on the bolt screw to monitor the growth of hole-edge damage. Coil winding configuration of the eddy current array sensor made by one actuation coil throughout all depth and several sensing coils along the depth is proposed to quantify the damage growth, especially the damage depth. Simulation and experimental study were conducted to verify the ability of quantitatively monitoring the hole-edge damage growth.
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Hu Sun, Jianbo Shao, Yishou Wang, Xinlin P. Qing, "Quantitative monitoring of hole-edge damage growth using eddy current array sensor-based intelligent bolt ", Proc. SPIE 10600, Health Monitoring of Structural and Biological Systems XII, 1060005 (27 March 2018); doi: 10.1117/12.2299272; https://doi.org/10.1117/12.2299272
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