期刊
TRIBOLOGY INTERNATIONAL
卷 153, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106590
关键词
Hydrodynamic lubrication; Acoustic emission; Surface roughness parameters; Dynamic fluid-asperity shearing
资金
- National Natural Science Foundation of China [51705127, 51875166]
- Hebei Provincial International Science and Technology Cooperation Program of China [17394303D]
- Joint Doctoral Training Foundation of HEBUT [2018HW0005]
- Tribology Science Fund of the State Key Laboratory of Tribology [SKLTKF18A05]
This paper investigates the mechanism and characteristics of Acoustic Emission (AE) generated from the dynamic Fluid-Asperities Shearing (FAS) in the hydrodynamic lubrication (HL) regime. The study shows that the correlation length of surface roughness parameters and shear rate are the two main factors affecting FAS behaviors and consequently AE characteristics. Experimental validation of the model and new findings pave the foundation for developing AE based monitoring techniques.
This paper investigates the mechanism and characteristics of Acoustic Emission (AE) generated from the dynamic Fluid-Asperities Shearing (FAS) in the hydrodynamic lubrication (HL) regime. Firstly, a FAS model is derived to take into account the dynamic effect of surface asperities. Then, the influence of surface profiles, lubricants and operating conditions are illustrated on AE characteristics, i.e. magnitudes and frequency bandwidths. It has been found that the correlation length of surface roughness parameters and shear rate are two main factors affecting FAS behaviours and consequently AE characteristics. Finally, the corresponding experiments are carried out based on a rheometer rig, which validate the predictability of the model and new findings, paving the foundation for developing AE based monitoring techniques.
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