民机机体蒙皮划痕的应力分析及处理方法研究  

Study on Stress Analysis and Treatment of Scratch on Fuselage Skin of Civil Aircraft

作　　者：张中波[1] ZHANG Zhong-bo(Aviation Engineering Institute,Civil Aviation Flight University of China,Guanghan 618307,China)

机构地区：[1]中国民用航空飞行学院航空工程学院,四川广汉618307

出　　处：《西安航空学院学报》2018年第5期3-7,共5页Journal of Xi’an Aeronautical Institute

基　　金：四川省教育厅重点项目(16ZA0020);中国民用航空飞行学院科学基金面上项目(J2014-30)

摘　　要：为了研究民用运输机蒙皮表面上常见的划痕损伤,根据划痕发生部位的结构特点,建立其应力分析模型,采用有限元分析方法,研究应力集中系数与外载荷、划痕宽度、划痕深度之间的变化规律。仿真得出,当划痕尺寸不变时,划痕所受应力集中系数基本不随外载荷的变化而变化;当外载荷不变时,划痕深度值增大时比划痕宽度值增大时对划痕所受应力集中系数影响大。分析仿真结果,提出了民机机体蒙皮划痕处理的三种方案,为航线维护中划痕处理提供理论支持。To study common scratches on fuselage skin of civil aircraft,the paper establishes their stress analysis model according to the features of the structure with scratches,and studies the changing law among stress concentration coefficient and external load,scratch width,and scratch depth through the finite element analysis method.The results of emulation indicate that when scratch sizes remain unchanged,stress concentration coefficient of scratches basically does not change with external load;when external load remains unchanged,the bigger scratch depth has the more significant impact on stress concentration coefficient than scratch width.Therefore,the paper presents three solutions as the theoretical support to the treatment of scratches on fuselage skin of civil aircraft.

关 键 词：机体蒙皮 划痕 应力集中 航线维护 

分 类 号：V223[航空宇航科学与技术—飞行器设计] V414.32