Abstract
The acquisition and evaluation of acoustic emissions (AE) in tribology have proven to be a meaningful tool for condition monitoring and offer possibilities to deepen the understanding of tribological processes. The authors used this technology with the aim of expanding existing test methodologies towards increased visualization capability of tribological processes and investigated the correlation between tribological processes and acoustic emissions on a Ring-on-Disc and a close-to-component journal bearing test setting. The results of this study include the description of friction as well as wear processes and prove the usability of several AE evaluation parameters whereby a close correlation between AE and tribological processes can be shown. Consequently, it was possible to expand the visualization and evaluation capabilities of the test settings offering additional insights by making use of AE.
Highlights
Conventional tribological parameters such as coefficient of friction (COF), temperature, and contact resistance offer detailed information about ongoing tribological processes when applied on tribological test rigs
The acquisition and evaluation of acoustic emissions (AE) in tribology have proven to be a meaningful tool for condition monitoring and offer possibilities to deepen the understanding of tribological processes
It was possible to expand the visualization and evaluation capabilities of the test settings offering additional insights by making use of AE
Summary
Conventional tribological parameters such as coefficient of friction (COF), temperature, and contact resistance offer detailed information about ongoing tribological processes when applied on tribological test rigs. For industrial applications, their use is often connected with unjustifiable effort and insufficient results [1, 2]. The subsequent analysis of emitted AE offers a wide range of possibilities to deepen the understanding of friction and wear processes. The evaluation of AE has been increasingly applied in tribological processes such as investigations of friction and wear processes as well as cavitation phenomena [1, 7, 8]. Fields of interest include both conformal and nonconformal contacts on model scale as well as industrial application. Roller bearings as a representative of Hertzian contacts have been investigated by many authors [7, 8, 10,11,12,13,14,15]
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