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- W4250997659 abstract "As the first step to clarify the self-loosening mechanism of threaded joints under ultrasonic vibration, the development of a new method is reported to evaluate the tightening condition in threaded joints. Where a test specimen with threaded joint is subjected to ultrasonic vibration in the axial direction, the sharpness of resonance Q1 is measured using resonance method. In the other hand, the sharpness of resonance Q0 for a uniform bar without threaded joint of the same dimension as a test specimen is measured, and the ratio of sharpness of resonance φ1=Q1/Q0 is calculated. Since Q1 shows the resonating characteristics of ultrasonic vibration through the joint, ca can be used as an evaluating measure of tightening condition in threaded joints. Using this method, the effects of tightening force, lubricating condition and others on the tightening condition are investigated experimentally. The obtained results are as follows : 1) The ratio of sharpness of resonance increases with an increase in the tightening force. 2) When silicone grease is used as a lubricant, the tightening condition is the stablest in this experiment. 3) These results approximately correspond to the experiences concerning the tightening technique of the joints in the application field of ultrasonic vibration." @default.
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- W4250997659 date "1979-01-01" @default.
- W4250997659 modified "2023-09-27" @default.
- W4250997659 title "Self-loosening of Threaded Joints under Ultrasonic Vibration" @default.
- W4250997659 doi "https://doi.org/10.2493/jjspe1933.45.957" @default.
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