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Behavior of acoustic emissions at the onset of sliding friction

Author:
Hiroo Taura  Kazuki Nakayama  


Journal:
Tribology International


Issue Date:
2018


Abstract(summary):

Abstract Detecting the slip using the acoustic emission (AE) technique is useful for condition-monitoring of machinery and equipment. However, the characteristics of the AE signals at the onset of a slip are insufficiently clarified. We conducted friction tests and simultaneously measured the AE signal, friction, and relative displacement of a brass ball in contact with a flat steel plate. The AE signal clearly increased during the slip, and the effective value of the AE signal well-mimicked the sliding speed. In a frequency analysis of the AE signals, the characteristic frequency components increased significantly during the slip. From the obtained data, we also calculated the AE energy and the friction work during the slip. Both values shared a strong proportional relationship. Highlights • Investigated the characteristics of an AE signal at the onset of a slip. • AE-signal amplitude was unchanged before/after each slip but changed during slip. • AE signal varied similarly to the sliding speed of the object.


Page:
155-155


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