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The influence of pin inclination on frictional behaviour in pin-on-disc sliding and its implications for test reliability

Yue, Hongzhi 1; Schneider, Johannes ORCID iD icon 1; Frohnapfel, Bettina ORCID iD icon 2; Gumbsch, Peter 1
1 Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM), Karlsruher Institut für Technologie (KIT)
2 Institut für Strömungsmechanik (ISTM), Karlsruher Institut für Technologie (KIT)

Abstract:

The pin-on-disc test is a widely employed method for investigating the friction and wear performance of materials in conformal contact. In a typical pin-on-disc system, self-aligning pin holders are frequently utilized to ensure proper surface contact. This study reveals that in such a setup, pin inclination has a significant impact on test reliability, particularly under oil-lubricated conditions, which may overweight the influence of other parameters such as roughness or texture elements. Utilizing in-situ measurements, we captured the dynamic changes in pin inclination during rotational sliding. Our findings indicate that the pin inclination varies with sliding speed, showing a pitch angle difference of approximately 0.01°as the speed decreases from 2 m/s to 0.04 m/s in our test setup. Importantly, a robust correlation was identified between the friction coefficient and pin inclination, which is supported by the numerical investigation. This study underscores concerns regarding the test reliability of pin-on-disc tribometers, prompting a reconsideration of the assumptions associated with self-aligning pin holders in such experimental configurations.


Verlagsausgabe §
DOI: 10.5445/IR/1000174401
Veröffentlicht am 02.10.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Strömungsmechanik (ISTM)
Institut für Angewandte Materialien – Zuverlässigkeit und Mikrostruktur (IAM-ZM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2024
Sprache Englisch
Identifikator ISSN: 0301-679X, 1879-2464
KITopen-ID: 1000174401
Erschienen in Tribology International
Verlag Elsevier
Band 200
Seiten Art.-Nr.: 110083
Vorab online veröffentlicht am 08.08.2024
Schlagwörter Pin-on-disc test, Pin inclination, Mixed or hydrodynamic lubrication, Multi-scale modelling
Nachgewiesen in Web of Science
Dimensions
Scopus
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