Volume 14, Issue 11 (2-2015)                   Modares Mechanical Engineering 2015, 14(11): 175-184 | Back to browse issues page

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Zakeri M, Kharazmi M. Modeling of Friction In Micro/Nano scale with Random Roughness Distribution. Modares Mechanical Engineering 2015; 14 (11) :175-184
URL: http://mme.modares.ac.ir/article-15-9916-en.html
Abstract:   (5282 Views)
In this paper, friction of the contacted surfaces with random roughness distribution in nano scale has been modeled and simulated. So, firstly the modified friction model, AMM, was derived for the contact of the flat/rough surfaces based on the JKR contact, HK friction model and random distribution of Greenwood-Williamson (GW) model. The results show, modified AMM model predict higher friction force. It is more accurate than the earlier AMM model due to considering of the surface forces. Following, the obtained model was extended for evaluating of friction between a flat particle and the rough surface, and especially for the tip of the atomic force microscopic on the rough surface. Then the effect of geometric parameters of surface such as standard deviation of the asperities height and radius of the asperities peak on the friction between tip and rough surface was done. It was observed that normal load and friction force are increased with growing of the standard deviation of the asperities height while as the friction coefficient will be reduced. Furthermore, the normal load, the friction force, and also the friction coefficient are raised by increasing of the asperity peak radius. Finally, it was observed that variation of standard deviation of the asperity height has more influence on the friction than the radius of the asperity peak
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Article Type: Research Article | Subject: robatic|Manufacturing Methods|Micro & Nano Systems|Mechatronics
Received: 2014/03/11 | Accepted: 2014/04/26 | Published: 2014/09/30

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