Assessment of the tribological contact between sliding surfaces via an entropy approach

[+] Author and Article Information
Vera Deeva

Tomsk Polytechnic University, Lenina avenue 30, Tomsk, 634050, Russia

Stepan Slobodyan

Omsk State Technical University, Tver State Technical University, Mira avenue 11, Omsk, 644050, Russia

1Corresponding author.

ASME doi:10.1115/1.4041644 History: Received May 25, 2018; Revised September 29, 2018


The interaction observed between two surfaces in contact with one another is part of a number of physical processes, such as wear. In this paper, we present a numerical study of the asperities between two surfaces in contact with each other. The real contact area between two surfaces varies due to the multiple roughness scales caused by the stochastic nature of asperities. In our research, we employ a tribological system comprising two partitions: ?1 is the contact set, where the two surfaces are in direct contact with each other, and ?2 is the non-contact set, where the two surfaces are not in contact with each other. Here, we have developed a new numerical model to describe the contact set using e-entropy to prove the existence of a minimum value for entropy in sliding contact scenarios. In this system, the lower and upper bounds of entropy are determined through the Kolmogorov approach using the aforementioned model. Using this model, we conclude that the e-entropy value is bound between ln 2 and 2·ln 2 for a tribological system comprising two partitions. Additionally, we conclude that a correlation between the stochastic tribological contact behavior and the rate of entropy change is the key parameter in thermal non-equilibrium scenarios.

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