【摘要】 为评估某型飞机中央翼下壁板萌生疲劳裂纹后的使用安全性 ,进行结构模拟件疲劳试验 ,并利用AFGROW软件对其疲劳裂纹的扩展寿命进行估算 ,与试验结果进行对比 ,初步确定出该部位裂纹扩展速率 ,为裂纹故障部位的修理提供参考依据更多还原

【Abstract】 Fatigue crack was found in the lap joint panel of the central wing lower structure in an aircraft. To assess the safety of the structure, simulated structure specimen was designed and fatigue test was performed under design fatigue load. Test results were reported,and analyzed crack growth cycles predicted by the AFGROW software package compared and agreed well with test results. It also gave suggestion for the repair of crack failure.更多还原