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dc.contributor.authorBai, Xueyuen_US
dc.contributor.authorDong, Qingbingen_US
dc.contributor.authorZheng, Hanen_US
dc.contributor.authorZhou, Kunen_US
dc.identifier.citationBai, 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.
dc.description.abstractThis 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.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.description.sponsorshipNational Research Foundation (NRF)en_US
dc.relation.ispartofActa Mechanica Solida Sinicaen_US
dc.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/.en_US
dc.subjectEngineering::Mechanical engineeringen_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleModelling of non-Newtonian starved thermal-elastohydrodynamic lubrication of heterogeneous materials in impact motionen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Mechanical and Aerospace Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.description.versionPublished versionen_US
dc.subject.keywordsLubrication Starvationen_US
dc.subject.keywordsNon-Newtonian Behaviouren_US
dc.description.acknowledgementThis research work was conducted in the SMRT-NTU Smart Urban Rail Corporate Laboratory with funding support from the National Research Foundation (NRF), Singapore, SMRT, Singapore and Nanyang Technological University, Singapore. Q.B. also acknowledges the support from National Natural Science Foundation of China, China (Grant No. 51905051).en_US
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