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      A comparison of stick and slip contact conditions for a coated sphere compressed by a rigid flat

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      Friction

      Tsinghua University Press

      contact mechanics, coatings, stick, elastic-plastic

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          Abstract

          A finite element analysis is used to study the elastic-plastic contact of a coated sphere compressed by a rigid flat under the stick contact condition. This was done for a wide range of hard coating material properties and coating thicknesses. A comparison with the slip contact condition is presented in terms of the critical contact parameters (at yield inception) and plasticity evolution. Empirical expressions are provided for critical interferences of the first and second yield inceptions, in the coating and on the substrate side of the interface, respectively. An expression is also provided for the dimensionless coating thickness for optimal resistance to plasticity under the stick contact condition. Additionally, the relations between different contact parameters in the elastic-plastic regime are presented. In general, it was found that the contact condition has a negligible effect on the contact parameters, except for phenomena occurring close to the contact area.

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          Most cited references 32

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          Contact of Nominally Flat Surfaces

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            Materials selection guidelines for low thermal conductivity thermal barrier coatings

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              An Elastic-Plastic Model for the Contact of Rough Surfaces

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                Author and article information

                Journal
                Tsinghua Science and Technology
                Friction
                Tsinghua University Press (Xueyuan Building, Tsinghua University, Beijing 100084, China )
                2223-7690
                05 September 2017
                : 05
                : 03
                : 326-338 (pp. )
                Affiliations
                Department of Mechanical Engineering, Technion, Haifa 32000, Israel
                Author notes
                * Corresponding author: Roman GOLTSBERG, E-mail: goltsberg.roman@ 123456gmail.com

                Shai RONEN. He received his bachelor degree in mechanical engineering in 2010 from Technion-Israel Institute of Technology. Recently he had obtained his master degree in design and manufacturing management from the same institute.

                Roman GOLTSBERG. He received his bachelor degree in mechanical engineering in 2010 from Technion- Israel Institute of Technology. In 2015 he had obtained his Ph.D. degree in mechanical engineering from the same institute. His research interests include contact mechanics of coatings and hydrodynamic bearings.

                Izhak ETSION. He received his PhD degree in 1974 from Technion-Israel Institute of Technology. Since then he was a faculty at the Department of Mechanical Engineering where he is currently a Professor Emeritus. His research interests are in hydrodynamic lubrication, surface texturing, contact mechanics, nano-tribology and bio-tribology. Etsion has published over 200 papers on various aspects of tribology and holds 15 patents. He is the founder of Surface Technologies Ltd. that developed the laser surface texturing (LST) technology for friction and wear reduction. His honors include Fellow of the ASME (1999), Fellow of the STLE (2001), the STLE 2005 International Award and the ASME 2016 Mayo D. Hersey Award.

                Article
                2223-7690-05-03-326
                10.1007/s40544-017-0178-2

                This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                Page count
                Figures: 14, Tables: 0, References: 34, Pages: 13
                Categories
                Research Article

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