Vol. 6, No. 1-4, 2011

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ISSN: 1559-3959
Analysis of hard coatings on a substrate containing inhomogeneities

Kun Zhou, Leon M. Keer and Q. Jane Wang

Vol. 6 (2011), No. 1-4, 627–639
Abstract

We investigate the effect stiff inhomogeneities in the substrate beneath a hard coating have on the elastic field. The solution of multiple interacting three-dimensional inhomogeneities in a half-space is utilized by modeling a coating layer as an inhomogeneity of finite size. The study shows that stiff inhomogeneities in the substrate do not worsen the cracking and debonding of hard coatings, but are still detrimental to the yielding behavior of the substrate even though it is under the protection of a hard coating.

Keywords
hard coating, inhomogeneity, equivalent inclusion method, yielding
Milestones
Received: 21 June 2010
Revised: 28 October 2010
Accepted: 4 November 2010
Published: 28 June 2011
Authors
Kun Zhou
Department of Mechanical Engineering
Northwestern University
2145 Sheridan Road
Evanston, IL 60208-3100
United States
School of Mechanical and Aerospace Engineering
Nanyang Technological University
50 Nanyang Avenue
Singapore 639798
Singapore
Leon M. Keer
Department of Mechanical Engineering
Northwestern University
2145 Sheridan Road
Evanston, IL 60208-3100
United States
Q. Jane Wang
Department of Mechanical Engineering
Northwestern University
2145 Sheridan Road
Evanston, IL 60208-3100
United States