考虑微凸体相互作用与基体变形的结合面静摩擦因数模型  

STATIC FRICTION COEFFICIENT MODEL OF JOINT SURFACES CONSIDERING ASPERITIES INTERACTION AND SUBSTRATE DEFORMATION

作　　者：许雍泰 张学良[1] 赵海路 XU YongTai;ZHANG XueLiang;ZHAO HaiLu(College of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学机械工程学院,太原030024

出　　处：《机械强度》2023年第3期662-667,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51275328);山西省自然科学基金项目(201901D111248);太原科技大学校级研究生创新项目(XCX212071)资助。

摘　　要：研究推导了更符合实际情况的考虑微凸体相互作用与基体变形的结合面静摩擦因数统计模型。在考虑微凸体相互作用与基体变形的结合面接触载荷模型的基础上,根据结合面静摩擦因数定义推导了考虑微凸体相互作用与基体变形的结合面静摩擦因数统计模型。将实验测得的结合面参数代入所建模型进行仿真,发现考虑微凸体相互作用与基体变形的结合面静摩擦因数大于不考虑微凸体相互作用与基体变形的静摩擦因数;微凸体相互作用与基体变形对静摩擦因数的影响程度随着无量纲法向接触载荷的增大而减小,随着结合面无量纲距离的减小而减小,随着轮廓高度均方根的减小而增大。将所建模型仿真计算结果与静摩擦因数实验结果数据进行了对比分析,结果表明,考虑微凸体相互作用与基体变形的结合面静摩擦因数更接近实验数据,说明了所建模型的正确性。A statistical model of static friction factor of joint surfaces was deduced,which was more in line with the actual situation and takes into account the interaction of asperities and the deformation of the substrate.Based on the contact load model of joint surfaces considering the interaction of asperities and the deformation of the substrate,the statistical model of the static friction factor of joint surfaces considering the interaction of asperities and the deformation of the substrate was deduced according to the definition of the static friction coefficient of joint surfaces.The parameters of joint surfaces measured by the experiment are substituted into the model for simulation,and it is found that the static friction coefficient of joint surfaces considering the asperities interaction and the substrate deformation is larger than that without considering the asperities interaction and the substrate deformation.The influence of the asperities interaction and the substrate deformation decreases with the increase of the dimensionless normal contact load and decreases with the decrease of the dimensionless distance of joint surfaces,and increases with the decrease of the root mean square of the profile height.The simulation results of the model are compared with the experimental data of the static friction factor.The results show that the static friction coefficient of joint surfaces considering the asperities interaction and the substrate deformation is closer to the experimental data,which shows that the model is correct.

关 键 词：结合面 微凸体相互作用 基体变形 静摩擦因数 统计模型 

分 类 号：TH117.1[机械工程—机械设计及理论]