Research Article | OPEN ACCESS
The Relationship between the Friction Coefficient and the Asperities Original Inclination Angle
1Guan Cheng-yao, 1Qi Jia-fu, 1Qiu Nan-sheng, 2Zhao Guo-chun, 3Zhang Hou-he, 1Yang Qiao, 4Bai Xiang-dong and 1Wang Chao
1State Key Laboratory of Petroleum Resources and Prospecting,
China University of Petroleum, Beijing 102249, China
2The College of Geosciences and Resources, China University of
Geosciences, Beijing 100083, China
3Research Center, CNOOC, Beijing 100027, China
4Institute of Disaster Prevention Science and Technology, Sanhe, Hebei 065201, China
Research Journal of Applied Sciences, Engineering and Technology 2013 11:1906-1910
Received: September 30, 2012 | Accepted: November 15, 2012 | Published: July 25, 2013
Abstract
Because of the contact deformation, the inclination angle of the contact face is decreased gradually when contact and deformation. Base on the change of inclination angle of the contact surface, the concept “friction repose angle” set out. The tangent of the initial inclination angle of two asperities is three time of the tangent of the “friction repose angle”. The relationship set up a bridge between the initial surface geometric configuration (can be detect) and the configuration which after the deformation (can not be detect). Static Friction Coefficient is the max value of Kinetic Friction Coefficient before the deformation process of instantaneous contact surface. The Ratio of Kinetic and Static Friction Coefficient distribute from 0.771 to 0.9117 and were inversely proportional to the inclination angle of the contact face .Kinetic Friction Coefficient is the average friction coefficient of the deformation process of instantaneous contact surface. In the sandstone, the value of Kinetic Friction Coefficient which more than 0.5546 is because of the coupling of different classes zigzag-shape surface asperities mostly. The study puts forward the new ideas “dynamic deformation tribology” which will promote the development of the Tribology.
Keywords:
Dynamic friction, friction repose angle, inclination angle of the asperities, instantaneous contact surface, kinetic friction coefficient, static friction coefficient,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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