An experimental-analytical investigation was conducted to study the fatigue properties of ZL114A aluminum alloy with low-velocity impact pit. The analysis of the fracture surfaces indicated that the cracks initiated at the position with tension residual stress rather than at the pit. Considering that the pit depth has a direct correlation with the magnitude of residual stresses, a new damage evolution equation involving a dimensionless parameter about pit depth was proposed to reflect the detrimental effect of pit. The proposed model was applied to the fatigue life prediction of specimens and hole plates with impact pit, and the result was within a twice-error band compared with the experimental data.

对ZL114A铝合金低速冲击坑的疲劳性能进行了实验分析研究。断口分析表明，裂纹起源于有拉伸残余应力的位置，而不是在凹坑处。考虑到凹坑深度与残余应力的大小直接相关，提出了一种新的包含凹坑深度无量纲参数的损伤演化方程来反映凹坑的不利影响。将该模型应用于带冲击坑的试件和孔板的疲劳寿命预测，与实验数据相比，结果在两倍误差范围内。