机械科学与技术2012，Vol.31Issue(5)：855-860,6.
连接件疲劳寿命分析的改进SSF法
A Modified Stress Severity Factor Approach for Fatigue Lifetime Prediction of Joints
王克峰 1姚卫星2
作者信息
- 1. 陆军航空兵学院机械工程系,北京101123
- 2. 南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016
- 折叠
摘要
Abstract
In the present work,a few problems existing in the stress severity factor（SSF） approach used for the fatigue life analysis of joints were studied and an improvement of the approach was accomplished.Based on the observation of the fatigue damage failures,the point at the edge of the hole which is vertical to the overall loading direction was defined to be the fatigue damage dangerous point.2D and 3D contact finite element analyses of the joints were carried out.Taking into consideration of converting relation between the three-dimension stress concentration and the two-dimension stress concentration,the extrusion stress concentration factor and extrusion distribution factor were gotten,and thus the modified SSF approach was obtained.Two examples of the fatigue life analysis of joints were accomplished using the modified SSF approach and the results demonstrated that this modified SSF approach gives a more accurate prediction for the fatigue life.关键词
连接件/疲劳寿命/应力严重系数/接触算法/三维应力集中Key words
joints/fatigue life/stress severity factor/contact algorithm/three-dimension stress concentration分类
航空航天引用本文复制引用
王克峰,姚卫星..连接件疲劳寿命分析的改进SSF法[J].机械科学与技术,2012,31(5):855-860,6.
