Determination of friction factor by ring compression testing and FE analysis

Michal Gzyl¹, Andrzej Rosochowski², Lech Olejnik³, Kamil Sikora⁴, Muhammad Jawad Qarni¹

¹Advanced Forming Research Centre, University of Strathclyde, 85 Inchinnan Drive, Renfrew PA4 9LJ, United Kingdom.
²Design, Manufacture and Engineering Management, University of Strathclyde, James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, United Kingdom.
³Institute of Manufacturing Technology, Warsaw University of Technology, ul. Narbutta 85, 02-524 Warsaw, Poland.
⁴Department of Applied Computer Science and Modelling, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland.

DOI:

https://doi.org/10.7494/cmms.2015.1.0516

Abstract:

The goal of this study was to examine performance of various lubricants for aluminium alloy AA5083. Conventional ring compression tests were conducted at 200°C. Samples were compressed to 50% of the initial height with a constant ram velocity 0.5 mm/s using a servo-controlled hydraulic press. The optimization procedure was implemented in selfdeveloped software to identify friction factors from experiments. The application launches remotely finite element (FE) simulations of ring compression with a changing friction factor until a difference between experiment and numerical prediction of the internal diameter of the sample is smaller than 0.5%. FE simulations were run using Forge3 commercial software. The obtained friction factor quantitatively describes performance of a lubricant and can be used as an input parameter in FE simulation of other processes. It was shown that application of calcium aluminate conversion coating as pre-lubrication surface treatment reduced friction factor from 0.28 to 0.18 for MoS2 paste. It was also revealed that commercially available graphite-based lubricant with an addition of calcium fluoride applied on conversion coating of calcium aluminate had even lower friction factor of 0.11

Cite as:

Gzyl, M., Rosochowski, A., Olejnik, L., Sikora, K., & Qarni, M. (2015). Determination of friction factor by ring compression testing and FE analysis. Computer Methods in Materials Science, 15(1), 156-161. https://doi.org/10.7494/cmms.2015.1.0516

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