Effects of 3D anisotropic heterogeneous subsurface topology on film thickness, pressure, and subsurface stresses in an elasto-hydrodynamically lubricated point contact

Binbin Zhang*, Hai Chao Liu, Armando Félix Quiñonez, Cornelis H. Venner

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)
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Abstract

Bearing steel on a sufficiently small scale is strongly heterogeneous and anisotropic. To enable evaluation of the criticality of particular aspects of the microstructure, in this paper an EHL model is solved by the developed multigrid algorithm for a full 3D elastic domain containing varying anisotropic heterogeneous material. Pressure fluctuations and local stress concentrations occur mostly near the boundaries of grains that have large orientation differences. As a consequence, the crystallographic microstructure may have a significant effect on rolling contact fatigue life unless grains are very small relative to the Hertzian contact. However, to the contrary, the influence of crystallographic microstructure on the film thickness distribution under the considered steady state conditions is very small.

Original languageEnglish
Article number106471
JournalTribology international
Volume151
Early online date8 Jul 2020
DOIs
Publication statusPublished - Nov 2020

Keywords

  • UT-Hybrid-D
  • Contact stress
  • Coupled EHL
  • Multigrid method
  • Anisotropic material

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