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Lubrication Properties of Various Pattern Shapes on Rough Surfaces Considering Asperity Contact

돌기접촉을 고려한 거친 표면 위 다양한 패턴 형상에 따른 윤활 특성 연구

  • Kim, Mi-Ru (Department of Nano Fusion Technology, Pusan National UNIV.) ;
  • Lee, Seung-Jun (Division of Nano Convergence Technology, Pusan National UNIV.) ;
  • Jeong, Jae-Ho (Subdivision of Mechanical engineering, Kyungnam college of Information&Technology) ;
  • Lee, Deug-Woo (Department of Nano Mechatronics Engineering, Pusan National UNIV.)
  • 김미루 (부산대학교 나노융합기술학과) ;
  • 이승준 (부산대학교 BK나노융합기술사업단) ;
  • 정재호 (경남정보대학교 기계계열) ;
  • 이득우 (부산대학교 나노메카트로닉스공학과)
  • Received : 2018.06.29
  • Accepted : 2018.07.08
  • Published : 2018.08.31

Abstract

Two surfaces that have relative motion show different characteristics according to surface roughness or surface patterns in all lubrication areas. For two rough surfaces with mixed lubrication, this paper proposes a new approach that includes the contact characteristics of the surfaces and a probabilistic method for a numerical analysis of lubrication. As the contact area of the two surfaces changes according to the loading conditions, asperity contact is very important. An average flow model developed by Patir-Cheng is central to the study of lubrication for rough surfaces. This average flow model also refers to a multi-asperity contact model for deriving a modified Reynolds equation and calculating the lubricant characteristics of a bearing surface with random roughness during fluid flow. Based on the average flow model, this paper carried out a numerical analysis of lubrication using a contact model by considering a load change made by the actual contact of asperities between two surfaces. Lubrication properties show different characteristics according to the surface patterns. This study modeled various geometric surface patterns and calculated the characteristics of lubrication.

Keywords

References

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