斜搭接连接件疲劳特性分析  

Fatigue Performance of Scarfed Lap Joint

作　　者：杨仕超[1] 王安强[1] 闫五柱[1] 元辛[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129

出　　处：《材料工程》2012年第9期83-87,共5页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(50775183;50805118);高等学校学科创新引智计划项目(bo7050);西工大基础研究基金(JC201238)

摘　　要：为了研究搭接角度对斜搭接连接件疲劳特性影响的规律,对不同搭接角度的斜搭接连接件进行了疲劳试验,并利用有限元软件对紧固孔在拉伸状态时的应力场进行了分析,采用名义应力法对紧固孔的疲劳寿命进行了估算。结果表明:失效部位发生在第一排孔边处;疲劳寿命随着搭接角度的增加而增大;搭接角度与疲劳寿命近似曲线关系为lg N=6.047-1.020×0.6601α。A series of fatigue tests were carried out on scarfed lap joints to explore the effect of lap angle on its fatigue performance. Finite element method （FEM） was employed to analyze the stress dis- tribution around the circular holes under tensile load. On the basis of calculation results, fatigue life was predicted by nominal stress approach. The results show that the first row of fasteners undergoes the most severe stress concentration. The fatigue life increases with the increase of lap angle. The relationship between lap angle and fatigue life can be expressed as.lgN=6. 047-1. 020×0. 6601α.

关 键 词：斜搭接 疲劳寿命 名义应力法 有限元 

分 类 号：TH131[机械工程—机械制造及自动化]