Session: SE-02-02 Seismic Isolation and Structural Dynamics-2

Paper Number: 122347

122347 - Experimental Study on Applicability of Triboelectric Film Sensors for Integrity Monitoring of Shear Bolted Joints 

Many structures such as bridges, buildings, or automobiles use various joining methods such as screws, rivets, welding, gluing, and caulking to join members together. In particular, the shear bolted joints is widely used as a joining method that facilitates assembly and disassembly, while being accompanied by a troublesome problem of bolt loosening due to repeated shear force. In the previous study, we proposed a self-powered film-shaped triboelectric sensor made of inexpensive materials, being installed between the contact surfaces at the joint, to monitor the loosening of tensile bolted joints. The principle of the sensor is that it detects microscale relative motions between the contacting surfaces at the joint as the triboelectric induced voltage, when the integrity of the joint is deteriorated due to the decrease in the bolt’s fastening force. In this study, we apply our sensor to shear bolted joints. A sensor is designed, fabricated, and tested in a single-bolt shear joint subjected to lateral shear forces. In the tests, the fatigue testing machine is used to apply cyclic loads to the joints, and the relationship between the sensor output and the bolt tightening force is investigated as a feasibility study. Monitoring of the self-loosening process of the bolt due to oscillatory shear loading is also be attempted and the results is reported.

Presenting Author: Chu Wang Kyoto Institute of Technology

Presenting Author Biography: Ph.D. student at Kyoto Institude of Technology doing Triboelectric Film Sensor for Integrity Monitoring of
Bolted Joints.

Authors:

Chu Wang Kyoto Institute of Technology
Nanako Miura Kyoto Institute of Technology
Motoaki Hiraga Kyoto Institute of Technology
Arata Masuda Kyoto Institude of Technology