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Research Papers: Contact Mechanics

Investigation of Inclined Planar Rough Surfaces Contact From Static to Sliding

[+] Author and Article Information
Ting Ni

School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong-chuan Road, Shanghai 200240, P. R. China

Xi Shi1

School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong-chuan Road, Shanghai 200240, P. R. Chinaxishi@sjtu.edu.cn

1

Corresponding author.

J. Tribol 132(4), 041403 (Oct 08, 2010) (9 pages) doi:10.1115/1.4002378 History: Received March 03, 2010; Revised August 03, 2010; Published October 08, 2010; Online October 08, 2010

Due to the friction moment, when two flat rough surfaces come to sliding contact or quasi-sliding contact, there is an inclined angle between these two surfaces. A two degree-of-freedom inclined rough surface contact model is presented in this work and the effects of the angular displacement on the friction coefficient, interfacial forces, and interfacial moments for the elastic-plastic planar rough surfaces contact are investigated. The numerical simulations show that both interfacial forces and interfacial moments gain with the increase of the inclined angle while the friction coefficient decreases instead. In addition, for a given sliding mass block system, the effects of that friction coefficient and base sliding speed on the stability of the sliding contact are also discussed. The simulations indicate that a larger friction coefficient and a higher base sliding speed tend to turn over the mass block during the sliding.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Contact model of rough surfaces

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Figure 2

Inclined rough surface contact: (a) diagram of inclined rough surfaces contact, (b) physical model of inclined rough surface contact, (c) stepwise linear approximation of inclined surface, and (d) 2-DOF dynamic model for the inclined rough surfaces contact

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Figure 3

Effects of the angular displacement on the interfacial forces and moments: (a) interfacial forces versus dimensionless angular displacement and (b) interfacial moments versus dimensionless angular displacement

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Figure 4

Effects of the angular displacement on the static friction coefficient: (a) dimensional static friction coefficient versus dimensionless angular displacement and (b) dimensionless static friction coefficient versus dimensionless angular displacement

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Figure 5

|Mq/Mp| versus dimensionless angular displacement

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Figure 6

Effect of friction coefficient on the dynamic responses: (a) dimensionless deflected normal displacement versus time and (b) dimensionless angular displacement versus time

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Figure 7

Effect of friction coefficient on the dynamic dimensionless surface separation yo∗ and dimensionless angular displacement θ∗

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Figure 8

Effect of base sliding velocity on time varying dimensionless angular displacement: (a) with friction coefficient of 0.5918 and (b) with friction coefficient of 3.4182

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