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

Vera Deeva, Stepan Slobodyan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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: C1 is the contact set (CS), where the two surfaces are in direct contact with each other, and C2 is the noncontact set, where the two surfaces are not in contact with each other. Here, we have developed a new numerical model to describe the CS using ϵ-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 ϵ-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 nonequilibrium scenarios.

Original languageEnglish
Article number031602
JournalJournal of Tribology
Volume141
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

sliding
Entropy
entropy
partitions
sliding contact
Numerical models
roughness
Surface roughness
Wear of materials
interactions

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

Assessment of the tribological contact between sliding surfaces via an entropy approach. / Deeva, Vera; Slobodyan, Stepan.

In: Journal of Tribology, Vol. 141, No. 3, 031602, 01.03.2019.

Research output: Contribution to journalArticle

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