摘要
飞机机轮轮毂安装螺栓是重要的结构承力件,强度高,对裂纹敏感,一旦使用中出现裂纹将快速扩展直至断裂,对飞行安全构成较大威胁。在对近年来发生的十余起机轮螺栓断裂失效事件从失效模式、失效原因进行深入分析的基础上发现,无论疲劳、氢脆还是应力腐蚀,除与设计、选材、加工工艺有关外,还与应力水平的高低密切相关,以此结合机轮维修装配工艺过程,提出了一系列降低螺栓工作应力水平的措施并运用于机轮维修实践,显著降低了螺栓断裂的风险。
The bolts of aircraft wheel hub are important structural load-bearing components with high strength and sensitivity to cracks.Once a crack appears during use,it will quickly expand until fracture,posing a great threat to flight safety.Based on in-depth analysis of more than ten cases of bolt fracture in recent years from failure modes and causes,it is found out that fatigue,hydrogen embrttlement,and stress corrosion are closely related to stress level in addition to design,material selection,and processing technology.Combined with aircraft wheel maintenance and assembly process,a series of measures to reduce working stress level of bolts are proposed and applied in the wheel maintenance practice,significantly reducing the risk of bolt fracture.
作者
刘仲文
胡小虎
赵永强
雷楚雄
朱朝钰
李浩然
LIU Zhongwen;HU Xiaohu;ZHAO Yongqiang;LEI Chuxiong;ZHU Chaoyu;LI Haoran(Ameco Chengdu Branch,Chengdu 610201,China;Ameco Southwest Maintenance Center,Chengdu 610201,China)
出处
《成都航空职业技术学院学报》
2023年第2期36-40,共5页
Journal of Chengdu Aeronautic Polytechnic
关键词
飞机机轮
轮毂螺栓
疲劳
应力腐蚀
氢脆
失效分析
aircraft wheel
wheel hub bolt
fatigue
stress corrosion
hydrogen embrittlement
failure analysis
作者简介
刘仲文(1963-),男,四川成都人,工学硕士,高级工程师,主要从事航空器及零部件失效分析及航空材料理化检测。
