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Open AccessArticle

Stribeck Curve of Magnetorheological Fluid within Pin-on-Disc Configuration: An Experimental Investigation

Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czech Republic
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Materials 2020, 13(20), 4670; https://doi.org/10.3390/ma13204670
Received: 1 September 2020 / Revised: 8 October 2020 / Accepted: 16 October 2020 / Published: 20 October 2020
(This article belongs to the Section Smart Materials)
The paper focuses on the coefficient of friction (COF) of a magnetorheological fluid (MRF) in the wide range of working conditions across all the lubrication regimes—boundary, mixed, elastohydrodynamic (EHD), and hydrodynamic (HD) lubrication, specifically focused on the common working area of MR damper. The coefficient of friction was measured for MR fluids from Lord company with concentrations of 22, 32, and 40 vol. % of iron particles at temperatures 40 and 80 °C. The results were compared with a reference fluid, a synthetic liquid hydrocarbon PAO4 used as a carrier fluid of MRF. The results show that at boundary regime and temperature 40 °C all the fluids exhibit similar COF of 0.11–0.13. Differences can be found in the EHD regime, where the MR fluid COF is significantly higher (0.08) in comparison with PAO4 (0.04). The COF of MR fluid in the HD regime rose very steeply in comparison with PAO4. The effect of particle concentration is significant in the HD regime. View Full-Text
Keywords: friction; Stribeck curve; magnetorheological fluid; pin on disc; MR damper; tribological performance friction; Stribeck curve; magnetorheological fluid; pin on disc; MR damper; tribological performance
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MDPI and ACS Style

Roupec, J.; Jeniš, F.; Strecker, Z.; Kubík, M.; Macháček, O. Stribeck Curve of Magnetorheological Fluid within Pin-on-Disc Configuration: An Experimental Investigation. Materials 2020, 13, 4670. https://doi.org/10.3390/ma13204670

AMA Style

Roupec J, Jeniš F, Strecker Z, Kubík M, Macháček O. Stribeck Curve of Magnetorheological Fluid within Pin-on-Disc Configuration: An Experimental Investigation. Materials. 2020; 13(20):4670. https://doi.org/10.3390/ma13204670

Chicago/Turabian Style

Roupec, Jakub; Jeniš, Filip; Strecker, Zbyněk; Kubík, Michal; Macháček, Ondřej. 2020. "Stribeck Curve of Magnetorheological Fluid within Pin-on-Disc Configuration: An Experimental Investigation" Materials 13, no. 20: 4670. https://doi.org/10.3390/ma13204670

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