摘要
对反对称犬骨状连接试件进行疲劳试验,并通过有限元分析,研究孔周应力分布,验证基于应力应变的多轴疲劳预测模型。试验和有限元分析表明,疲劳裂纹一般首先在双犬骨板交界处附近的螺钉孔形成;沉头螺钉连接,使得应力峰值偏向两板交界处;基于应力应变的多轴疲劳寿命预测模型估计试件的疲劳寿命误差为14.5%。
The objectives are to describe the stress distribution at countersunk fastener holes, to validate the availability of the multi-axial fatigue life predicating method. Both experimental and computational studies are described and compared when possible. The results show that： 1. Fatigue failure usually starts at the locations near the holes where two bones meet each other. 2. Countersunk fastener joint make the peak value of the stress appear at the locations near the holes where two bones meet each other. 3. The error of the method based on both stress and strain used for predicting fatigue life of this type of specimens is 14.5%.
出处
《机械强度》
CAS
CSCD
北大核心
2009年第2期293-296,共4页
Journal of Mechanical Strength
基金
国家自然科学基金资助项目(10472094
50375124)~~
