粗糙陶瓷涂层与刚性平面滑动摩擦过程的数值模拟  

Numerical Simulation of Sliding Friction Process Involving Rough Ceramic Coating and Rigid Plane

作　　者：韩传军[1] 张杰[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《材料保护》2013年第8期36-39,共4页Materials Protection

基　　金：国家自然科学基金(51004083)资助

摘　　要：陶瓷涂层在滑动接触过程中的温升对零部件的接触和力学性能有重要的影响。应用有限元法,建立了含多粗糙峰陶瓷涂层与刚性平面的滑动接触模型,并通过热机耦合计算对滑动摩擦过程进行了数值模拟,分析了滑动过程中陶瓷涂层、粘结层和基体的温度及应力分布规律,研究了相对滑动速度、初始压入量、摩擦系数和涂层厚度对各部分的温升、等效应力和接触应力的影响。结果表明:陶瓷涂层的最高温度出现在粗糙峰的滑动接触面上,其高温区也集中在粗糙峰部分;与静态接触相比,滑动接触改变了各部分内部应力的分布;粘结层和基体的最大等效应力和最高温度随着运动速度和摩擦系数的增大而升高,随涂层厚度的增加而降低;粘结层和基体在滑移前后的最大等效应力及最高温度均与压入量近似成线性关系。Finite element method was adopted to establish the sliding contact model of ceramic coating possessing multiple asperities and rigid plane. Besides,coupled thermo-mechanical analysis of the sliding friction process was conducted,and the distributions of temperature and stress of the ceramic coating,adhesive layer,and substrate during the sliding process were analyzed. Furthermore, the effects of relative sliding velocity,initial pressed amplitude, friction coefficient and coating thickness on the temperature rise, equivalent stress and contact stress at various locations of the parts were investigated. Results showed that the highest temperature of the ceramic coating appeared on the contact surfaces of asperities,and high temperature regions were also located on the asperities. As compared with static contact, sliding contact changed the stress distribution of each part. Besides,the highest equivalent stress and temperature of the adhesive layer and substrate tended to increase with the increase of relative sliding velocity and friction coefficient,but they tended to decrease with increasing coating thickness. Moreover,the maximum equivalent stress and temperature of the adhesive layer and substrate before and after sliding were approximately linearly proportional to the pressed amplitude.

关 键 词：滑动摩擦 数值模拟 陶瓷涂层 热机耦合 应力 温度 有限元法 

分 类 号：TB304[一般工业技术—材料科学与工程]