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Dong, Conglin; Mo, Jiliang; Yuan, Chengqing; Bai, Xiuqin; Tian, Yu
Tribology letters, 12/2019, Volume: 67, Issue: 4Journal Article
Frictional vibration and noise usually cause machining error and noise pollution. Stick–slip plays an important role in generating frictional vibration and noise. This study characterized frictional vibration and noise during the stick–slip of a Si 3 N 4 ceramic/metal friction by using an acoustic emission method. Experimental results showed that frictional vibration and noise mostly occurred during the slip process. The impacts of the rough peaks between metal disk and ceramic ball during sliding induced the vibration to irradiate noises. The superposition among the frictional vibrations caused the multiplication of vibrational frequency. The major vibrational frequency slowly shifted to a higher frequency as the increase in sliding speed. The vibrational accelerations and their major vibrational frequency increased with the increase in the external load. The knowledge gained herein provides a more comprehensive understanding of stick–slip friction, frictional vibration, and noise, and offers a guidance for controlling or minimizing stick–slip, frictional vibration, and noise.
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