逐层钻孔法测试多层材料残余应力数值研究  

Numerical Analysis of Incremental-Step Blind Hole Drilling Method for Studying Relaxation Coefficients A and B of Residual Stresses in Thermal Barrier Coatings(TBCs)

作　　者：徐颖强[1] 李剑锋[1] 汪震隆[1] 

机构地区：[1]西北工业大学机电学院,陕西西安710072

出　　处：《西北工业大学学报》2009年第1期39-42,共4页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(10672134;50875214)资助

摘　　要：以典型的复合层状材料热障涂层为例,利用有限元分析软件对热障涂层的松弛系数进行了数值计算分析研究。介绍了逐层钻孔法有限元三维模拟分析具体步骤。通过计算分析,分别研究了TBC层微观孔形和BC层厚度及钻孔进给量对系数的影响,从而找出孔型变化和厚度增加对对系数影响的变化规律。Advanced multi-layered ceramic coatings are being used increasingly on metallic substrates as protective coatings for engine metal components to improve performance at high temperature,e.g.TBCs for use in gas turbine components. It is well known that the residual stresses due to the mismatch between metallic bond coatings(BCs) and ceramic top coatings as well as the stresses due to the oxidation of the bond coatings cause the debonding of the TBCs,leading to the collapse of thermal barrier system.Section 1 ...

关 键 词：残余应力 数值分析 涂层 松弛系数 逐层盲孔钻削法 热障涂层(TBC) 

分 类 号：TB302[一般工业技术—材料科学与工程]