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Technical Brief

Investigations of the Adhesive Contact Behavior of Elastic Layered Media With Surface Roughness

[+] Author and Article Information
Yuyan Zhang

Department of Mechanical and Electrical Engineering,
Nanjing Forestry University,
Nanjing 210037, China
e-mail: yuyan_zhang@njfu.edu.cn

Lina Si

Department of Mechanical and Materials Engineering,
North China University of Technology,
Beijing 100144, China

Xiaoqing Zhang

Department of Materials Science and Mechanical
Engineering,
Beijing Technology and Business University,
Beijing 100048, China

Juan Li, Wanjun Wang

Department of Mechanical and Electrical Engineering,
Nanjing Forestry University,
Nanjing 210037, China

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received July 26, 2018; final manuscript received December 27, 2018; published online February 5, 2019. Assoc. Editor: Liming Chang.

J. Tribol 141(4), 044504 (Feb 05, 2019) (5 pages) Paper No: TRIB-18-1298; doi: 10.1115/1.4042505 History: Received July 26, 2018; Revised December 27, 2018

A deterministic adhesive model for the contact between an elastic layered medium with surface roughness and a smooth elastic microsphere was developed on the basis of the Lennard–Jones surface force law. Through numerical simulations, the adhesive contact behavior of the layered medium with the measured three-dimensional (3D) surface topography was comparatively analyzed with that of the homogeneous medium. Furthermore, the contact characteristics of the layered medium with pre-assigned roughness parameters were investigated with the aid of a computer-generated technique for simulating surface roughness. Results showed that the pull-off force for the contact problem involving rough surfaces was influenced by the contact location, and the average value for the contact between an alumina (SiO2) microsphere and a diamond-like carbon/silicon (DLC/Si)-layered medium was smaller than that for the contact between a SiO2 microsphere and a Si homogeneous half-space. In addition, the effect of the diamond-like carbon (DLC) layer on reducing adhesion was smaller than that of the surface roughness. Finally, the average pull-off force for a DLC/Si-layered medium with computer-generated surface roughness rapidly decreased; however, it eventually became almost unchangeable with the increase in the root-mean-square (RMS) deviation.

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Figures

Grahic Jump Location
Fig. 1

Illustrations of a smooth elastic microsphere in adhesive contact with a rough-layered medium: (a) undeformed configuration and (b) deformed configuration

Grahic Jump Location
Fig. 2

Comparisons of present results with Si et al. [18] and Song and Komvopoulos [7]

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Fig. 3

Force–approach curves for layered media and homogeneous media: (a) for samples with a rough surface and (b) for samples with a smooth surface

Grahic Jump Location
Fig. 4

Pull-off force at different contact locations on the rough surface: (a) for the DLC/Si layered medium and (b) for the Si homogeneous half-space

Grahic Jump Location
Fig. 5

The average pull-off force for the DLC/Si layered medium, the Si homogeneous half-space and the DLC homogeneous half-space

Grahic Jump Location
Fig. 6

Variations of the average pull-off force of the layered medium with RMS roughness

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