微凸体相互作用和基底变形对结合面静摩擦因数的影响  

Influence of Asperity Interaction and Substrate Deformation on Joint Surface Static Friction Coefficient

作　　者：王颜辉 郭强 孙万 张学良[3] 巩少鹏 WANG Yanhui;GUO Qiang;SUN Wan;ZHANG Xueliang;GONG Shaopeng(Mechatronics Engineering,Shanxi Institute of Energy,Jinzhong Shanxi 030600,China;Oil Film Bearing Sub-Co.,Taiyuan Heavy Industry Co.,Ltd.,Taiyuan Shanxi 030024,China;School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]山西能源学院机电工程系,山西晋中030600 [2]太原重型机械集团有限公司油膜轴承分公司,山西太原030024 [3]太原科技大学机械工程学院,山西太原030024

出　　处：《机床与液压》2025年第7期40-46,共7页Machine Tool & Hydraulics

基　　金：山西省高等学校科技创新项目(2022L611);山西省自然科学基金项目(202203021221151);山西省高等学校教育教学改革与实践项目(J20241534);山西能源学院科研基金项目(ZY-2023012,ZY-2023013);国家自然科学基金面上项目(51275328)。

摘　　要：结合面静摩擦因数是摩擦润滑研究中的一个重要参数。为了探讨结合面微凸体相互作用以及微凸体基底变形对结合面静摩擦因数的影响以及二者对摩擦因数影响的显著程度,建立基于GW模型的结合面静摩擦因数模型和分别考虑相互作用和基底变形的结合面静摩擦因数模型。在建立考虑基底变形的结合面静摩擦因数模型的过程中,应用力的静平衡原理以及位移平衡原理,建立等效基底复合弹性模量的计算模型。通过MATLAB软件仿真对比了不同塑性指数下3种模型的结合面静摩擦因数随量纲一法向接触载荷及量纲一平均分离间距的变化关系。结果表明:微凸体间的相互作用和基底变形对结合面静摩擦因数有显著影响,二者均有利于静摩擦因数的增大;微凸体间的相互作用和基底变形对结合面静摩擦因数影响的显著性与等效微凸体的复合弹性模量与等效基底的复合弹性模量的比值λ相关,在相同塑性指数和量纲一平均分离间距下,当λ小于临界值λ0时,相互作用的影响较为显著,当λ大于λ0时,基底变形的影响更为显著;λ0由接触条件决定,不同接触条件对应不同的λ0。Joint surface static friction coefficient is an important parameter in the research of friction lubrication.In order to explore the influence and significance of asperity interaction and substrate deformation on the joint surface static friction coefficient,three static friction coefficient models based on the GW model and considering asperity interaction and substrate deformation separately were established.At the same time,the equilibrium principle was used to establish the calculation model of equivalent base composite elastic modulus.The relationship between static friction coefficient and dimensionless normal contact load and dimensionless average separation distance under plastic index was compared by MATLAB.The results show that asperity interaction and substrate deformation have a significant effect on the static friction coefficient,both of which increase the static friction coefficient.The significance of asperity interaction and substrate deformation on static friction coefficient is related to ratioλof elastic modulus of the asperity to the elastic modulus of substrate.Under the condition of same plastic index and dimensionless average separation distance,the effect of asperity interaction is more significant when it is less than critical valueλ0,on the contrary,the influence of base deformation is more significant.The parameterλ0 is determined by contact conditions,and different contact conditions have different values.

关 键 词：结合面 静摩擦因数 微凸体相互作用 基底变形 

分 类 号：TH113.1[机械工程—机械设计及理论]