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http://dx.doi.org/10.9725/kts.2019.35.1.16

Effect of Surface Film and Surface Roughness on Contact Resistance  

Lee, HyeonCheol (Graduate School, Dept. of Mechanical Engineering, Pusan National University)
Lee, Bora (Graduate School, Dept. of Mechanical Engineering, Pusan National University)
Yu, Younghun (Graduate School, Dept. of Mechanical Engineering, Pusan National University)
Cho, Youngjoo (Graduate School, Dept. of Mechanical Engineering, Pusan National University)
Publication Information
Tribology and Lubricants / v.35, no.1, 2019 , pp. 16-23 More about this Journal
Abstract
In this study, we aim to analyze the effects of both contact layer properties and surface roughness on contact resistance. The contact has a great influence on performance in terms of electrical conduction and heat transfer. The two biggest factors determining contact resistance are the presence of surface roughness and the surface layer. For this reason we calculated the contact resistance by considering both factors simultaneously. The model of this study to calculate contact resistance is as follows. First, the three representative surface parameters for the GW model are obtained by Nayak's random process. Then, the apparent contact area, real contact area, and contact number of asperities are calculated using the GW model with the surface parameters. The contact resistance of a single surface layer is calculated using Mikic's constriction equation. The total contact resistance is approximated by the parallel connection between the same asperity contact resistances. The results of this study are as follows. The appropriate thickness with reduction effect for contact resistance is determined according to the difference in conductivity between the base layer and surface layer. It was confirmed that the standard deviation of surface roughness has the greatest influence on surface roughness parameters. The results of this study will be useful for selecting the surface material and surface roughness when the design considering the contact resistance is needed.
Keywords
surface film; surface roughness; GW model; contact resistance; constriction resistance;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 Kim, T. G., Oh, J. S., Yoon, H. K., "Characteristics of DLC films incorporated HMDS by RF PECVD", International Journal of Modern Physics B (IJMPB), Vol.24, No.15n16, pp.2999-3004, 2010.   DOI
2 Jeong, J. I., Kim, D. H., Park, J. Y., Choi, S. G., Kim, S. S., Choi, Y. T., Ham, H. S., "Comparison of mechanical properties and surface friction of white metal produced by centrifugal and laser cladded on SCM 440", Tribol. Lubr., Vol.34, No.3, pp.84-92, 2018, doi:10.9725/kts.2018.34.3.84   DOI
3 Greenwood, J. A., Williamson, J. B. P., "Contact of nominally flat surfaces", Proceedings of the Royal Society of London. A: Mathematical, Physical and Engineering Sciences, Vol.295, No.1442, pp. 300, 1966.   DOI
4 Nayak, P. R., "Some aspects of surface roughness measurement", Wear, Vol.26, No.2, pp.165-174, 1973.   DOI
5 Kim, T. W., Cho, Y. J., "EHL analysis for rough surface with directional roughness", J. Korean Soc. Tribol. Lubr. Eng., Vol.25, No.5, pp.342-347, 2009.
6 Yu, Y. H., Cho, Y. J., "Analysis of contact stiffness and bending stiffness according to contact angle of curvic coupling", Tribol. Lubr., Vol.34, No.1, pp.23-32, 2018, doi:10.9725/kts.2018.34.1   DOI
7 Cooper, M. G., Mikic, B. B., Yovanovich, M. M., "Thermal contact conductance," Int. J. Heat Mass Transf., Vol.153, pp.317-323, 1969.
8 Madhusudana, C. V., "Thermal contact conductance", Second edi. Sydney: Springer, 2014.
9 Mikic, B., Carnasciali, G., "The effect of thermal conductivity of plating material on thermal contact resistance", Trans. ASME J. Heat Transfer, pp. 475-482, 1970.
10 Ikeda, E., "Electrical Construction Design Practical Data Book", ISBN - 9788985485166, 2007.