摘要
为研究粗糙表面中微凸体变形和基体变形对表面动态接触特性的影响,利用GW模型和Hertz接触理论推导出微凸体的接触刚度和基体的接触刚度,通过耦合刚度提出了一种新的结合面微观接触模型。通过新模型与Hertz模型、有限元分析结果的对比发现,微凸体和基体材料弹性模量比值κ=0.60.8时,新模型计算得到的解更加趋近于有限元分析结果,在这个范围内新模型更优于Hertz模型,微凸体/基体系统的接触情况只与微凸体和基体材料弹性模量比值κ有关,与微凸体形状大小、微凸体材料和基体材料的弹性模量没有太大关系。
In order to investigate the effect of asperity and bulk substrate deformations on the micro contact charac- teristics of rough surface, the asperity contact stiffness and the bulk substrate stiffness are obtained by the Hertzian solution and GW model for spherical contact, finally a new micro contact model is estab- lished through the parallel coupling. Through the comparison of the new model and the Hertz model, the results of the finite element analysis, when K the ratio of material elastic modulus of the asperity and bulk substrate is in the range of 0.6 to 0.8, the solution obtained by the new model is closer to the finite element analysis results, the new model is better than Hertz model. The contact situation of asperity and bulk substrate system is related to K the ratio of the elastic modulus, and is not related to the shape and size of the asperity, and the elastic modulus of the material.
作者
阮晓光
张健
李玲
蔡安江
孟东容
RUAN Xiaoguang ZHANG Jiang LI Ling CAI Anjiang MENG Dongrong(Electromechanical Engineering College, Xi＇an University of Architecture and Technology,Xi＇an 710055, CHN)
出处
《制造技术与机床》
北大核心
2017年第5期67-73,共7页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金(51305327
51475352)
高等学校博士学科点专项科研基金(20136120120020)
关键词
接触力学
弹性接触
微凸体
接触模型
有限元模型
contact mechanics
elastic contact
asperity
contact model
finite element model
