【摘要】 当航空器结构在航线使用过程中出现疲劳裂纹损伤时,通常在裂纹尖端打止裂孔进行临时性修理。通过理论分析和计算及试验分析,研究了止裂孔尺寸对止裂效果的影响。结果表明,当航空器结构出现疲劳裂纹损伤时,采用5.57～7.14mm直径的止裂孔进行止裂修理,止裂效果较好;当止裂孔直径为6.35mm时,止裂效果最好。更多还原

【Abstract】 A kind of temporary maintenance which is to create stopping crack holes at both ends of a crack occurred because of mechanical fatigue,while the aircraft is at a stop on a ongoing flight service.Through a theoretical research,experimental analysis and algorithm,finding out that the effectiveness to terminate the crack by a stopping crack hole varies in dimension of the hole itself. A diameter ranging from 5.57~7.14 mm diameter is better,while a hole of 6.35 mm diameter is the most effective means to end to the development of a crack.更多还原