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Volume 11
Issue 10
10.3390/ma11101965
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Article

Effect of Hardening Exponent of Power-Law Hardening Elastic-Plastic Substrate on Contact Behaviors in Coated Asperity Contact

by
Xiqun Lu
,
Hanzhang Xu
and
Bin Zhao
*
College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(10), 1965; https://doi.org/10.3390/ma11101965
Submission received: 20 September 2018 / Revised: 9 October 2018 / Accepted: 11 October 2018 / Published: 12 October 2018
(This article belongs to the Section Thin Films and Interfaces)
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Abstract

The contact between a rigid flat and a coated asperity is studied using the finite element method. The substrate is assumed as the power-law hardening elastic–plastic material. The effect of the hardening exponent of the substrate (n) on the contact behaviors including contact load, area, coating thickness variation and stress in the coating, is investigated. It shows larger hardening exponent results in larger contact loads and larger maximum stresses in the coating at a given interference, and leads to smaller contact area at a specific contact load. The coating thickness becomes smaller monotonically as the interference increases for larger hardening exponents, while it recovers gradually after reaching the minimum value for the smaller n cases. This work will give some universal guidance to improve the contact performance for coatings by adjusting the hardening exponent of the substrate and by optimizing the coatings parameters.
Keywords: asperity contact; coatings; power-law hardening; contact behaviors; contact mechanics asperity contact; coatings; power-law hardening; contact behaviors; contact mechanics
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MDPI and ACS Style

Lu, X.; Xu, H.; Zhao, B. Effect of Hardening Exponent of Power-Law Hardening Elastic-Plastic Substrate on Contact Behaviors in Coated Asperity Contact. Materials 2018, 11, 1965. https://doi.org/10.3390/ma11101965

AMA Style

Lu X, Xu H, Zhao B. Effect of Hardening Exponent of Power-Law Hardening Elastic-Plastic Substrate on Contact Behaviors in Coated Asperity Contact. Materials. 2018; 11(10):1965. https://doi.org/10.3390/ma11101965

Chicago/Turabian Style

Lu, Xiqun, Hanzhang Xu, and Bin Zhao. 2018. "Effect of Hardening Exponent of Power-Law Hardening Elastic-Plastic Substrate on Contact Behaviors in Coated Asperity Contact" Materials 11, no. 10: 1965. https://doi.org/10.3390/ma11101965

APA Style

Lu, X., Xu, H., & Zhao, B. (2018). Effect of Hardening Exponent of Power-Law Hardening Elastic-Plastic Substrate on Contact Behaviors in Coated Asperity Contact. Materials, 11(10), 1965. https://doi.org/10.3390/ma11101965

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