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Coatings 2017, 7(2), 21; doi:10.3390/coatings7020021

Interfacial Mechanics Analysis of a Brittle Coating–Ductile Substrate System Involved in Thermoelastic Contact

Research Lab of Space & Aerospace Tribology, Harbin Insititute of Technology, Harbin 150001, China
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Academic Editor: Alessandro Lavacchi
Received: 14 November 2016 / Revised: 9 January 2017 / Accepted: 25 January 2017 / Published: 6 February 2017
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Abstract

In this paper, interfacial stress analysis for a brittle coating/ductile substrate system, which is involved in a sliding contact with a rigid ball, is presented. By combining interface mechanics theory and the image point method, stress and displacement responses within a coated material for normal load, tangential load, and thermal load are obtained; further, the Green’s functions are established. The effects of coating thickness, friction coefficient, and a coating’s thermoelastic properties on the interfacial shear stress, τxz, and transverse stress, σxx, distributions are discussed in detail. A phenomenon, where interfacial shear stress tends to be relieved by frictional heating, is found in the case of a coating material’s thermal expansion coefficient being less than a substrate material’s thermal expansion coefficient. Additionally, numerical results show that distribution of interfacial stress can be altered and, therefore, interfacial damage can be modified by adjusting a coating’s structural parameters and thermoelastic properties. View Full-Text
Keywords: contact mechanics; Green’s function; interfacial mechanics; brittle coating contact mechanics; Green’s function; interfacial mechanics; brittle coating
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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

Zhang, C.; Gu, L.; Nie, C.; Zhang, C.; Wang, L. Interfacial Mechanics Analysis of a Brittle Coating–Ductile Substrate System Involved in Thermoelastic Contact. Coatings 2017, 7, 21.

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