复合金属基/陶瓷涂层的应力分析  

Analysis of the Stress of Multiple Metal-based/Ceramic Coatings

作　　者：李方坡[1] 王引真[2] 王纬[1] 陈建民[2] 

机构地区：[1]中国石油大学(华东)研究生院,山东东营257061 [2]中国石油大学(华东)机电工程学院,山东东营257061

出　　处：《表面技术》2006年第5期71-72,75,共3页Surface Technology

基　　金：山东省优秀中青年科学家奖励基金资助项目(02BS048)

摘　　要：为了分析弯矩作用下金属基/陶瓷涂层应力分布情况,利用有限元分析软件建立计算模型,并计算不同涂层厚度和不同涂层弹性模量比条件下的拉应力和剪应力分布。计算结果表明:弯曲中心部位涂层的失效主要是由于拉应力所造成的,且拉应力值随涂层弹性模量的增加而增大,随涂层厚度的增加而减小;两端部位涂层的失效主要是由于剪应力所造成的,且剪应力值随着涂层弹性模量和涂层厚度的增加而增大;中间过渡涂层的存在可有力地减缓涂层到基体的应力变化梯度。A finite element model has been developed for calculating stress in multiple metal-based/ceramic coating by finite element software. The stress is calculated based on different layer thickness and electricity modes. The results demonstrate that the failure of the coating is mainly caused by tensile stress at the bending center, and the tensile stress value increases with coating＇s electricity mode and decreases with coating＇s thickness; However, the failure of the coating near the two sides is mainly caused by the shear stress, and the shear stress value increases with the coating＇s electricity mode and thickness; the middle transited layer significantly decreases stress gradient.

关 键 词：复合涂层 金属基/陶瓷涂层 有限元 应力分布 应力分析 

分 类 号：TG174.442[金属学及工艺—金属表面处理]