Al_2O_3陶瓷/Nb钎焊接头残余应力场的有限元分析  

The FEM Analysis of Distribution of Residual Thermal Stresses at Al_2O_3/Nb Brazed Joint

作　　者：祁凯[1] 于治水[1] 梁超[1] 李瑞峰[1] 吴铭方[1] 

机构地区：[1]华东船舶工业学院,江苏镇江212003

出　　处：《稀有金属材料与工程》2005年第1期37-40,共4页Rare Metal Materials and Engineering

基　　金：江苏省船舶先进设计制造技术重点实验室资助

摘　　要：利用有限元法,采用弹塑性理论对Al2O3陶瓷/Nb接头的应力场进行了数值模拟。得出了接头部位应力σx,σy和τxy的分布状态,研究发现在当接头界面结合良好时在界面附近的陶瓷侧的残余主应力(σ1)出现极大值,裂纹最有可能从此处开启,然后在残余主应力(σ2)的作用下向陶瓷内部延伸。In this paper, the distribution of residual thermal stresses was simulated using FEM with elastic-plastic analysis method. And the distribution of residual stresses σx, σy and τxy were also discussed. It is concluded that when the interface was bonded well, the flaws would produce at ceramic side adjacent to the interface because of stress σ1 and extend into ceramic substrate due to the principle stress σ2.

关 键 词：AL2O3 NB 钎焊 有限元分析 弹塑性理论 

分 类 号：TG407[金属学及工艺—焊接]