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Micromachines 2017, 8(10), 302; doi:10.3390/mi8100302

The Analysis of Three-Body Contact Temperature under the Different Third Particle Size, Density, and Value of Friction

1
Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan 701, Taiwan
2
Department of Power Mechanical Engineering, National Formosa University, Yunlin 632, Taiwan
*
Author to whom correspondence should be addressed.
Received: 24 July 2017 / Revised: 26 September 2017 / Accepted: 6 October 2017 / Published: 11 October 2017
(This article belongs to the Special Issue Microtribology, Adhesion and Surface Engineering)
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Abstract

Recently, many studies have investigated the friction, wear, and temperature characteristics of the interface between two relative movements. Such analyses often set the coefficient of friction as a fixed value and are analyzed in cases of two-body contact; however, the interface is often a three-body contact and the coefficient of friction varies depending on the operating conditions. This is a significant error in the analysis of contact characteristics, therefore, in this study, the actual interface and the change of the coefficient of friction were analyzed based on three-body micro-contact theory where the contact temperature was also analyzed and the difference between the generally assumed values were compared. The results showed that under three-body contact, the coefficient of total friction increased with an increase in particle size; and at a different particle size and area density of particles, the surface contact temperature increased with the plasticity index and load increases, and the particle contact temperature increased with the increasing particle size. The surface temperature rise was mainly affected by the ratio of the average temperature between surface 1 and surface 2 to the multiplication between the 100th root of the area density of particles and the square root of the equivalent surface roughness (Ts1s2_ave*/ηa0.01σ0.5) and the ratio of the 10th root of the mean particle diameter to the 100th root of the equivalent surface roughness (xa0.1/σ0.001). Particle temperature was mainly affected by the ratio of the 10th root of the mean particle diameter to the 100th root of the equivalent surface roughness (xa0.1/σ0.001) and the area density of particles ηa. Our study indicated that when the contact of surface with surface and the contact of the particles with the surface, the resulting heat balance was assigned to the particles and the surface in a three-body contact situation. Under this contact behavior, it could avoid a too high a rise in micro-contact temperature to achieve the material failure temperature. View Full-Text
Keywords: friction; wear; surface roughness; three-body micro-contact; contact temperature friction; wear; surface roughness; three-body micro-contact; contact temperature
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wu, H.-W.; Chen, Y.-Y.; Horng, J.-H. The Analysis of Three-Body Contact Temperature under the Different Third Particle Size, Density, and Value of Friction. Micromachines 2017, 8, 302.

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