基于Hertz接触理论的涂层界面应力分析  

Analysis of interfacial stress on coatings based upon hertz contact theory

作　　者：楼小玲[1] 鲍雨梅[1] 柴国钟[1] 郝伟娜[1] 蒋明安[2] 

机构地区：[1]浙江工业大学机械制造及自动化教育部重点实验室,浙江杭州310032 [2]台州职业技术学院,浙江台州317000

出　　处：《浙江工业大学学报》2006年第5期563-566,共4页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(50375145);浙江省自然科学基金资助项目(Y104279Y604051)

摘　　要：应用大型有限元分析软件ANSYS 8．1，对接触载荷条件下涂层材料的应力场进行了数值模拟．通过比较有限元解与经典Hertz解析解验证了有限元模型的可信度；分析了不同涂层厚度、不同涂层／基体弹性模量比情况下，接触应力分布情况及接触宽度随着载荷的变化情况．数值模拟结果表明：涂层／基体界面剪应力峰值出现在略偏离界面中心位置；涂层／基体界面正应力峰值出现在界面中心位置；涂层／基体的弹性模量比在1～2．5之间取值时，对涂层／基体结合效果较为有利；涂层过薄容易导致界面剪应力过大，致使材料失效．模拟结果能够为涂层材料的力学研究及设计提供参者．Finite element package ANSYS is applied to simulate the stress of coating material with contact loaded. The results of finite element method （FEM） and the solutions of classical Hertz analytical method are compared to prove the accuracy of FEM model. The variations of contact stress and contact width with contact load, under different coating thickness and different Young ＇s modulus are analyzed. The peak value of interface shear stress on coating/ substrate occurs near the central position, and that of the stress of coating/ substrate occurs exactly at the shape center. When the ratio of coating/substrate Young＇s modulus is between 1 and 2.5, the effects of coating/ substrate combination is perfect. The less thickness of the coating may result in the higher interface shear stress and destroy the material. Results of this work are helpful for mechanical research and design of coating material.

关 键 词：涂层 HERTZ接触 应力分析 

分 类 号：O343.3[理学—固体力学]