The size-dependent elastohydrodynamic lubrication contact of a coated half-plane with non-Newtonian fluid  

作　　者：Jie SU Hongxia SONG Liaoliang KE S.M.AIZIKOVICH 

机构地区：[1]School of Mechanical Engineering,Tianjin University,Tianjin 300350,China [2]School of Mathematical Science,Inner Mongolia University,Hohhot 010021,China [3]Laboratory of Functionally Graded and Composite Materials,Research and Education Center"Materials",Don State Technical University,Rostov-on-Don 344000,Russia

出　　处：《Applied Mathematics and Mechanics(English Edition)》2021年第7期915-930,共16页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Nos.11902217,11725207,12011530056);the Russian Foundation for Basic Research(No.20-58-53045-GFEN-a)。

摘　　要：Based on the couple-stress theory,the elastohydrodynamic lubrication(EHL)contact is analyzed with a consideration of the size effect.The lubricant between the contact surface of a homogeneous coated half-plane and a rigid punch is supposed to be the non-Newtonian fluid.The density and viscosity of the lubricant are dependent on fluid pressure.Distributions of film thickness,in-plane stress,and fluid pressure are calculated by solving the nonlinear fluid-solid coupled equations with an iterative method.The effects of the punch radius,size parameter,coating thickness,slide/roll ratio,entraining velocity,resultant normal load,and stiffness ratio on lubricant film thickness,in-plane stress,and fluid pressure are investigated.The results demonstrate that fluid pressure and film thickness are obviously dependent on the size parameter,stiffness ratio,and coating thickness.

关 键 词：elastohydrodynamic lubrication(EHL) non-Newtonian fluid size effect couple-stress theory coating 

分 类 号：O373[理学—流体力学]