销孔形状近似椭圆的新型钛合金拉伸试件的设计及应用  

Investigation into new titanium-alloy tensile specimens with elliptical pinholes

作　　者：苗德华[1] 王艳丽[1] 赵彤[1] 杨强[1] 

机构地区：[1]天津工程师范学院机械工程系

出　　处：《中国工程机械学报》2008年第1期58-62,67,共6页Chinese Journal of Construction Machinery

摘　　要：针对销孔式新型钛合金拉伸试件因应力集中而产生断裂等问题,提出了将圆柱销孔改为近似椭圆形状的结构设计思路.首先应用有限元方法模拟试件在拉伸过程的实际情况,分析结构参数与试件应力分布的关系,在此基础上确定了试件的结构参数,并使用所设计的试件进行拉伸实验,考察了退火处理条件对钛合金机械性能的影响.Specifically for the new titanium-alloy specimens with pinholes, the fracture occurs due to the stress concentration. In this regard, a new design conception is postulated to replace the cylindrical pinholes with elliptical pinholes. Firstly, the actual tensile process is simulated via the finite element method. Then, the relationship between structural parameters and stress distributions is analyzed for specimens. Upon completion of structural parameter determination and tensile testing, the mechanical properties are finally measured after annealing.

关 键 词：新型钛合金 拉伸试件 销孔形状 有限元方法 结构参数 

分 类 号：TH13[机械工程—机械制造及自动化]