首页 | 本学科首页   官方微博 | 高级检索  
     检索      

基于基底长度的粗糙表面分形接触模型的构建与分析
引用本文:丁雪兴,严如奇,贾永磊.基于基底长度的粗糙表面分形接触模型的构建与分析[J].摩擦学学报,2014,34(4):341-347.
作者姓名:丁雪兴  严如奇  贾永磊
作者单位:兰州理工大学 石油化工学院, 甘肃 兰州 730050;兰州理工大学 石油化工学院, 甘肃 兰州 730050;兰州理工大学 石油化工学院, 甘肃 兰州 730050
摘    要:为建立更为精确的粗糙表面接触模型,根据微凸体变形特征、分形理论以及摩擦的作用,从微观角度基于基底长度建立了粗糙表面分形接触模型.通过与其他粗糙表面接触模型和实验数据的比较,验证了本文模型的正确与合理,并由数值仿真分析了分形维数、接触载荷与真实接触面积之间的相互关系.分析结果表明:特征尺度一定时,要维持一定的真实接触面积,分形维数越大,所需要的力也越大;分形维数与特征尺度一定时,随着载荷的增加,接触面积也在增加;特征尺度与接触力一定时,随着分形维数的增大,真实接触面积在减小.该模型的建立为进一步研究粗糙表面的摩擦、磨损与润滑提供了理论依据.

关 键 词:粗糙表面  微凸体  分形  基底长度  接触模型

Construction and Analysis of Fractal Contact Mechanics Model for Rough Surface Based on Base Length
DING Xue xing,YAN Ru qi and JIA Yong lei.Construction and Analysis of Fractal Contact Mechanics Model for Rough Surface Based on Base Length[J].Tribology,2014,34(4):341-347.
Authors:DING Xue xing  YAN Ru qi and JIA Yong lei
Institution:College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China;College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Abstract:To establish a contact mechanics model of rough surface with better accuracy, the fractal contact mechanics model considering asperity's deformation properties, fractal theory and friction effect was established from micro perspective based on base length. Using other contact models of rough surface and experiment data as references, the proposed model was investigated. The relationship of fractal dimension, contact force and real contact area was studied by using numerical simulation analysis. The results indicate that the force increased with the increase of fractal dimension to maintain a certain real contact area when the characteristic length scale was fixed. Real contact area increased with the increase of force when fractal dimension and characteristic length scale were fixed. Real contact area decreased with the increase of fractal dimension when characteristic length scale and force were fixed. This model provided a foundation to research friction, wear and lubrication of rough surface.
Keywords:rough surface  asperity  fractal  base length  contact model
本文献已被 CNKI 等数据库收录!
点击此处可从《摩擦学学报》浏览原始摘要信息
点击此处可从《摩擦学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号