Journal
TRIBOLOGY INTERNATIONAL
Volume 114, Issue -, Pages 485-493Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2017.05.020
Keywords
Contact mechanics; Hard coatings; Elastic-plastic contact; Effective hardness
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A finite element analysis is used to investigate the elastic-plastic contact behavior of a coated sphere compressed by a rigid flat. The study concerns a wide range of material properties of the coating and substrate and covers the entire elastic-plastic regime of deformation including fully plastic contact. A transition interference, corresponding to maximum mean contact pressure, is presented that divides the elastic-plastic regime into two sub regimes in terms of the load interference relation. An effective hardness of coated spheres that is load independent is properly defined. An appropriate normalization of the contact parameters is found enabling a universal elastic-plastic coated spherical contact model.
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