Real-time fretting loop regime transition identification using acoustic emissions

Wade, Amanda; Copley, R.J.; Clarke, B.; Omar, Ahmad; Beadling, Andrew R.; Liskiewicz, Tomasz; Bryant, Michael

doi:10.1016/j.triboint.2019.106149

Cited by 9 publications

(1 citation statement)

References 41 publications

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“…In the particular case of fretting, which is a tribological phenomenon associated with a very small alternated displacement amplitude between two surfaces in contact, the AE technique was also used to investigate the damage mechanisms of fretting contacts in different regimes. A considerable number of studies are conducted on the evaluation of tribological mechanisms using AE amplitude [22][23][24][25][26][27]. For instance, they show that the debris generation on the surfaces during fretting and the ploughing action of the contact can lead to an increase of AE amplitude during a test.…”

Section: Introductionmentioning

confidence: 99%

Tribolumen: A Tribometer for A Correlation Between AE Signals and Observation of Tribological Process in Real-Time—Application to A Dry Steel/Glass Reciprocating Sliding Contact

et al. 2020

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This paper deals with the development of an original apparatus called TRIBOLUMEN designed specifically for friction experiments on transparent materials. The friction measurement is synchronized with an acoustic emission (AE) sensor and the device is also equipped with a high-speed camera offering a direct view at the interface to gain a deeper understanding of tribological mechanisms. The TRIBOLUMEN device is in ball-on-flat contact configuration with a range of strokes from 5 to 500 µm and an oscillation frequency from 5 to 600 Hz. The experiments showed that this device has an adequate rigidity and can detect subtle friction modifications of the oscillating contacts. The observation of a steel-on-glass contact in real-time highlighted the initiation of Hertzian cracks followed by the formation of debris in the contact. Using the synchronous measurement, these mechanisms were clearly associated with different stages in the friction measurement and in the AE signals, which permitted to identify the AE signature of Hertzian cracks.

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