摘要
对锪窝填充孔孔边角裂纹应力强度因子进行研究对提高结构安全性具有重要意义。根据飞机上常用的锪窝铆接典型结构,运用ANSYS软件对锪窝孔孔边角裂纹进行有限元分析,建立铆钉与锪窝孔接触模拟铆钉对锪窝孔的填充作用。计算得到含铆钉填充以及空孔时锪窝孔边不同裂纹尺寸下裂纹前缘的应力强度因子分布。对比分析结果表明:铆钉填充能显著降低锪窝孔边角裂纹的应力强度因子,提高结构寿命。
Reseach of stress intensity factor on corner crack at rivet-filled countersink hole is of important significance for improving the safety of structure. Countersunk riveted joints are commonly used in aircraft structures and are the principle structures sensitive to fatigue cracking. Corner cracks initiated from both sides of a rivetfilled countersunk hole and an open hole with no riveting were analyzed using ANSYS, a finite element analysis package, to obtain the stress intensity factors （SIFs） along the crack fronts. The results indicate that the river filled process can significantly reduce the SIF of the corner cracks of countersunk holes and thus enhance the fa tigue resistance.
出处
《航空工程进展》
2012年第2期195-200,共6页
Advances in Aeronautical Science and Engineering
关键词
锪窝孔
应力强度因子
有限元
角裂纹
countersink hole
stress intensity factors
finite element
corner crack
