利用扩展有限元方法研究了飞机外蒙皮埋头钉孔划窝角度和深度对蒙皮裂纹扩展寿命的影响,对工程常用的标准埋头钉孔构型进行了裂纹扩展分析.分析结果表明,埋头钉孔划窝会减少蒙皮结构的寿命,但随着蒙皮厚度增加,划窝的影响逐渐减小.分析结论和数据可用于对蒙皮结构寿命工程估算的修正. The effect of the angle and depth of the hatch hole in the outer skin of the aircraft on the propagation life of the skin crack was studied by means of the extended finite element method and the crack propagation analysis was carried out on the standard common-head screw hole configuration. The analysis results show that, Pore-hole nest will reduce the life span of the skin structure, but as the skin thickness increases, the impact of nesting decreases gradually. The analysis conclusion and data can be used to correct the estimation of the life span of the skin structure.