Modelling Acoustic Emissions induced by dynamic fluid-asperity shearing in hydrodynamic lubrication regime

Jiaojiao Ma, Hao Zhang, Zhanqun Shi, Fulei Chu, Fengshou Gu, Andrew D. Ball

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number106590
Number of pages12
JournalTribology International
Volume153
Early online date8 Aug 2020
DOIs
Publication statusE-pub ahead of print - 8 Aug 2020

Fingerprint Dive into the research topics of 'Modelling Acoustic Emissions induced by dynamic fluid-asperity shearing in hydrodynamic lubrication regime'. Together they form a unique fingerprint.

Cite this