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RESEARCH PAPERS

An EFG-FE Coupling Method for Microscale Adhesive Contacts

[+] Author and Article Information
Tianxiang Liu, Qin Xie, Q. Jane Wang

School of Mechatronic Engineering, Northwestern Polytechnical University, Xi’an, 710072, PR ChinaDepartment of Mechanical Engineering, Northwestern University, Evanston, IL 60208

Geng Liu1

School of Mechatronic Engineering, Northwestern Polytechnical University, Xi’an, 710072, PR Chinanpuliug@nwpu.edu.cnDepartment of Mechanical Engineering, Northwestern University, Evanston, IL 60208npuliug@nwpu.edu.cn

1

Corresponding author.

J. Tribol 128(1), 40-48 (Jun 26, 2005) (9 pages) doi:10.1115/1.2114931 History: Received February 13, 2005; Revised June 26, 2005

An elastic adhesive contact model based on the element-free Galerkin-finite element (EFG-FE) coupling method is presented in this paper. The model is first validated though comparison to theoretical solutions. A numerical simulation of the adhesive contact between a microelastic cylinder and a rigid half-space is then conducted. The adhesive contact characteristics of three metals (Al, Cu, and Fe) are studied at different Tabor parameters. The relationships of the applied load and contact half-width of the adhesive contacts are analyzed. Contact pressures, stress contours and deformed profiles of different cylinder sizes and applied loads are illustrated and discussed. The results are compared to published solutions, and good agreements are observed.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 1

Adhesion on the surfaces of contacting bodies

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Figure 2

Load-contact half-width relationship for the adhesive contact between cylinders as compare to that for the Hertz theory

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Figure 3

Adhesive forces derived from the L-J potential and the Dugdale model in fracture mechanics: (a) relationship between surface force and separation; (b) L-J force in a contact interface; and (c) pressure distribution in an adhesive contact of cylinders

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Figure 4

Two bodies in an adhesive contact

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Figure 5

Element-free Galerkin-finite element coupling method

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Figure 6

Numerical solution of the load-contact half width relationship under different Tabor parameters: (a) fcc Al, (b) fcc Cu, and (c) bcc Fe

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Figure 7

Pressure distributions under zero loading: (a) R=0.002mm, (b) R=0.003mm, (c) R=0.005mm, and (d) R=0.01mm

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Figure 8

von Mises stress contours in the meshless region under zero loading obtained with different Tabor parameter: (a) fcc Al, (b) fcc Cu, and (c) bcc Fe

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Figure 9

von Mises stress contours in the meshless region under different applied loads when the Tabor parameter is about 5: (a) fcc Al, (b) fcc Cu, and (c) bcc Fe

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Figure 10

Deformed profiles of the cylinder under different applied loads when the Tabor parameter is about 5: (a) FCC Al, (b) FCC Cu, and (c) BCC Fe

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