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Title: Modelling of non-Newtonian starved thermal-elastohydrodynamic lubrication of heterogeneous materials in impact motion
Authors: Bai, Xueyu
Dong, Qingbing
Zheng, Han
Zhou, Kun
Keywords: Engineering::Mechanical engineering
Engineering::Environmental engineering
Issue Date: 2021
Source: Bai, X., Dong, Q., Zheng, H. & Zhou, K. (2021). Modelling of non-Newtonian starved thermal-elastohydrodynamic lubrication of heterogeneous materials in impact motion. Acta Mechanica Solida Sinica, 34(6), 954-976.
Journal: Acta Mechanica Solida Sinica 
Abstract: This study presents a numerical model for the thermal-elastohydrodynamic lubrication of heterogeneous materials in impact motion, in which a rigid ball bounces on a starved non-Newtonian oil-covered plane surface of an elastic semi-infinite heterogeneous solid with inhomogeneous inclusions. The impact–rebound process and the microscopic response of the subsurface inhomogeneous inclusions are investigated. The inclusions are homogenized according to Eshelby’s equivalent inclusion method. The Elrod algorithm is adopted to determine the lubrication starvation based on the solutions of pressure and film thickness, while the lubricant velocity and shear rate of the non-Newtonian lubricant are derived by using the separation flow method. The dynamic response of the cases subjected to constant impact mass, momentum, and energy is discussed to reveal the influence of the initial drop height on the impact–rebound process. The results imply that the inclusion disturbs the subsurface stress field and affects the dynamic response of the contact system when the surface pressure is high. The impact energy is the decisive factor for the stress peak, maximum hydrodynamic force, and restitution coefficient, while the dynamic response during the early approaching process is controlled by the drop height.
ISSN: 0894-9166
DOI: 10.1007/s10338-021-00284-2
Rights: © The Author(s) 2021. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
NEWRI Journal Articles

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