Scuffing failure analysis based on a multiphysics coupling model and experimental verification  

作　　者：Bugao LYU Xianghui MENG Jiabao YIN Yi CUI Chengen WANG 

机构地区：[1]School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Friction》2024年第6期1214-1234,共21页摩擦（英文版）

基　　金：the National Natural Science Foundation of China(52130502,52171315);the National Key R&D Program of China(2022YFB4201102).

摘　　要：General reductions in lubricant viscosities and increasing loads in machine components highlight the role of tribofilms in providing surface protection against scuffing.However,the relationship between the scuffing process and the growth and removal of tribofilm is not well understood.In this study,a multiphysics coupling model,which includes hydrodynamic lubrication,asperity contact,thermal effect,tribochemistry reaction,friction,and surface wear,was developed to capture the initiation of surface scuffing.Simulations and experiments for a piston ring and cylinder liner contact were conducted following a step-load sequence under different temperature conditions.The results show that high temperature and extreme load could induce the lubricant film collapse,which in turn triggers the breakdown of the tribofilm due to the significantly increased removal process.The failures of both lubricant film and tribofilm progress instantaneously in a coupling way,which finally leads to severe scuffing.

关 键 词：scuffing failure TRIBOFILM boundary lubrication multiphysics coupling effects 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] TH117.1[自动化与计算机技术—控制科学与工程]