全滑移下球形粗糙表面的弹塑性接触模型  

Elastic-plastic model for rough spherical contact in slip contact condition

作　　者：李隆球[1,2] 王林[2] 张广玉[2] 宋文平[2] 

机构地区：[1]哈尔滨工业大学材料科学与工程博士后流动站,哈尔滨150001 [2]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2012年第9期62-68,共7页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(51105099);中国博士后基金资助项目(49)

摘　　要：为研究硬盘磁头和盘面的碰撞接触问题,提出了一种全滑移接触条件下,球形粗糙表面与理想刚性平面的弹塑性接触模型.通过数学建模与MATLAB仿真,分析了球形粗糙表面弹塑性接触状态下接触载荷、实际接触面积和法向接触分离、塑性指数之间的函数关系,并在不同塑性指数条件下,与理想光滑表面模型、CEB(Chang-Etsion-Bogy)模型及全粘着条件下的CKE(Cohen-Kligerman-Etsion)模型进行对比.结果表明:本模型在计算接触面积与接触载荷上比CEB模型及CKE模型更加准确.To investigate the impact of magnetic heads on disk in a hard disk drive, an elastic-plastic contact model for rough sphere contacting rigid flat in slip contact condition is provided. The normal load and the real contact area as functions of separation and plasticity index for the rough spherical elastic-plastic contact are in- vestigated by mathematical modeling and MATLAB simulating. The results are compared with the perfect smooth spherical contact model, CEB （Chang-Etsion-Bogy） model and CKE （Cohen-Kligerman-Etsion） mod- el in stick contact condition for different values of the plasticity index. It is shown that the normal load and real contact area of present model are more accurate than that of the CEB and CKE models. This is because the CEB and CKE models neglect the elastic-plastic contact and fully plastic of a single asperity, respectively, re- sulting in the limitation for the analysis.

关 键 词：粗糙峰 弹塑性接触 球形粗糙表面接触 接触力学 

分 类 号：O343.3[理学—固体力学] O344.1[理学—力学]