线接触作用下超薄膜-基底界面力学分析  

INTERFACE MECHANICAL ANALYSIS OF ULTRA THIN FILM-SUBSTRATE SYSTEM UNDER THE LINEAR CONTACT

作　　者：聂重阳[1] 郑德志[1] 古乐[1] 张弛[1] 王黎钦[1] 

机构地区：[1]哈尔滨工业大学航空宇航摩擦学研究室,哈尔滨150001

出　　处：《工程力学》2017年第12期202-209,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51275125;U1537214;51475452);国家重点基础研究发展规划项目(973)(2013CB632305)

摘　　要：高副接触的摩擦部件中广泛使用1μm左右的超薄膜,其界面失效对部件的工作寿命具有重要影响。该文针对轴承钢基底表面1μm厚度的硬质和软质超薄膜所构成的膜基系统,建立了线接触载荷作用下的界面力学分析模型。采用复变函数镜像法求解了单元点力的格林函数解,并积分获得了界面应力的分布状态。利用匀质模型完成了退化对比验证,以DLC和MoS_2两种硬软固体薄膜的线接触为例进行了计算和分析。该方法可用于机械部件表面沉积超薄膜的膜基界面分析与设计。Ultra-thin films of about 1 μm are widely used in friction pairs with point/line-contact, and their interfacial failures have significant effects on the service life of frictional components. An interface mechanical model of film-substrate system with hard or soft thin films deposited on the bearing steel surfaces is built to analyze the interface stresses and deformations under the linear contact. Using image method of complex function, the solution of unit point force is obtained as the Green＇s function for evaluating and integrating. The model is verified as a degradation of homogeneous material. The distribution states of interface stresses for a cylindrical contact with DLC and MoS2 of hard and soft films are calculated and discussed. This model can be used for interfacial analysis and design in the mechanical components with ultra-thin films.

关 键 词：界面力学 复变函数 镜像法 超薄膜 线接触 

分 类 号：TH117.1[机械工程—机械设计及理论]