Analytical Study of Sliding Instability due to Velocity- and Temperature-Dependent Friction

Oleksii Nosko

doi:10.1007/s11249-015-0628-9

Analytical Study of Sliding Instability due to Velocity- and Temperature-Dependent Friction

Abstract

The instability of sliding causes deterioration of performance characteristics of tribosystems and is undesired. To predict its occurrence, the motion of a body of a one-degree-of-freedom system with friction is investigated about the steady sliding equilibrium position. The motion equation is formulated with the friction coefficient dependent on the sliding velocity and contact temperature changing due to transient heat conduction in the body. An analytical expression for the body motion is derived using the Laplace integral transform. It is shown that the sliding instability can manifest in the form of deviation of the body from the equilibrium position or in the form of oscillation. The instability conditions containing the friction–velocity and friction–temperature slope coefficients are obtained. Positive friction–temperature slope results in the deviation of the body from the equilibrium position. At negative friction–temperature slope, both types of the sliding instability can occur. The proposed instability conditions agree well with existing theoretical concepts and can be useful when designing tribosystems.

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Oleksii Nosko dr hab. inż.
- KTH Royal Institute of Technology

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Publication version: Accepted or Published Version
DOI:: Digital Object Identifier (open in new tab) 10.1007/s11249-015-0628-9
License: Copyright (Springer Science+Business Media)

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Category:: Articles
Type:: artykuły w czasopismach
Published in:: TRIBOLOGY LETTERS no. 61, pages 1 - 10,
ISSN: 1023-8883
Language:: English
Publication year:: 2016
Bibliographic description:: Nosko O.: Analytical Study of Sliding Instability due to Velocity- and Temperature-Dependent Friction// TRIBOLOGY LETTERS -Vol. 61,iss. 1 (2016),
DOI:: Digital Object Identifier (open in new tab) 10.1007/s11249-015-0628-9
Verified by:: Gdańsk University of Technology