A Simplified Non-Hertzian Wheel-Rail Adhesion Model Under Interfacial Contaminations Considering Surface Roughness

IF 1.8 4区工程技术 Q3 ENGINEERING, CHEMICAL

Lubrication Science Pub Date : 2024-10-27 DOI:10.1002/ls.1726

Zhaoyang Wang, Bing Wu, Jiaqing Huang

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引用次数: 0

Abstract

The accuracy and efficiency of the wheel-rail adhesion model are important to the wheel-rail rolling contact issues. The purpose of this study is to develop a simplified non-Hertzian wheel-rail adhesion model under interfacial contaminations to predict the wheel-rail adhesion coefficient. Firstly, a non-Hertzian full elasto-hydrodynamic lubrication (EHL) model was developed and applied to determine the wheel-rail contact pressure and film thickness under interfacial contaminations. Then, the empirical formula of central film thickness available to non-Hertzian wheel-rail normal contact relating to train speeds, axle loads and material parameters were proposed based on a large number of non-Hertzian full EHL simulation for smooth surface under interfacial contaminations using linear regression. The empirical non-Hertzian central film thickness formula and minimum film thickness formula for wheel-rail contact obtained in this paper show certain differences from the formulas based on Hertzian contact. Using the proposed non-Hertzian central film thickness formula, a simplified non-Hertzian wheel-rail contact adhesion model was developed, and the adhesion coefficient was obtained at different speeds and compared with the field test data. The numerical results showed good agreement with field test data.

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来源期刊

Lubrication Science ENGINEERING, CHEMICAL-ENGINEERING, MECHANICAL

CiteScore

3.60

自引率

10.50%

发文量

审稿时长

6.8 months

期刊介绍： Lubrication Science is devoted to high-quality research which notably advances fundamental and applied aspects of the science and technology related to lubrication. It publishes research articles, short communications and reviews which demonstrate novelty and cutting edge science in the field, aiming to become a key specialised venue for communicating advances in lubrication research and development. Lubrication is a diverse discipline ranging from lubrication concepts in industrial and automotive engineering, solid-state and gas lubrication, micro & nanolubrication phenomena, to lubrication in biological systems. To investigate these areas the scope of the journal encourages fundamental and application-based studies on: Synthesis, chemistry and the broader development of high-performing and environmentally adapted lubricants and additives. State of the art analytical tools and characterisation of lubricants, lubricated surfaces and interfaces. Solid lubricants, self-lubricating coatings and composites, lubricating nanoparticles. Gas lubrication. Extreme-conditions lubrication. Green-lubrication technology and lubricants. Tribochemistry and tribocorrosion of environment- and lubricant-interface interactions. Modelling of lubrication mechanisms and interface phenomena on different scales: from atomic and molecular to mezzo and structural. Modelling hydrodynamic and thin film lubrication. All lubrication related aspects of nanotribology. Surface-lubricant interface interactions and phenomena: wetting, adhesion and adsorption. Bio-lubrication, bio-lubricants and lubricated biological systems. Other novel and cutting-edge aspects of lubrication in all lubrication regimes.