飞机桁条-蒙皮连接结构的接触应力研究  

Research on Contact Stress of Wing Stringers-Skin Connecting Structure in Aircraft

作　　者：陈文俊[1] 周桂宇[1] 赵鲁春[1] 

机构地区：[1]宜宾学院,四川宜宾644000

出　　处：《机械研究与应用》2015年第4期102-105,共4页Mechanical Research & Application

摘　　要：飞机结构是由零部件通过铆接、螺接、胶接和焊接连接而组成的。连接区域应力分布情况及应力水平的研究对飞机结构的强度校核及连接区的失效破坏形式的预判有着重要的意义。基于非线性接触力学理论,利用MSC.Patran/Nastran有限元分析软件对机翼结构中复合材料桁条-蒙皮连接结构进行了研究。研究内容包括:各排钉孔的最大等效应力和钉传载荷的分布情况;对飞机桁条-蒙皮的两种连接方式,基于非线性接触理论,分别建立了桁条-蒙皮的螺接连接结构和胶-螺混合连接结构,对比了两种结构的等效应力水平大小与分布。得出以下结论:板间厚度比对孔周接触域的应力集中系数和应力分布的影响较大;处于外侧两排铆钉孔传递较大的钉传载荷,中间排的铆钉孔的钉传载荷较小;不同的连接形式对孔周应力水平影响较大。Aircraft structures are formed by riveting, screwing, gluing and welding the connections and parts. Research of stress distribution and the stress level in the connected region of aircraft structures has great significance for strength check of aircraft structure and structural damage to connected region failures. Based on the nonlinear contact mechanics theory, the fi- nite element analysis software MSC. Patran/Nastran is used to investigate the aircraft connecting structure. The research in- cludes study on the distribution of maximum equivalent stress and the pin-load around the pin hole; the stringers-skin screw connecting structure and the glue-screw mixed connecting structure are respectively established based on the nonlinear contact theory, then the value and distribution of equivalent stress of these two kinds of connection modes are compared. The conclu- sion shows that the thickness ratio between plates has great influence on the stress concentration factor and stress distribution in the contact region around the hole ; major pin load would be transmitted in the outer two rows of rivet holes, while less pin load would be in the middle; different connection mode could greatly effect the stress distribution around the pin hole.

关 键 词：飞机 有限元分析 桁条-蒙皮 连接结构 接触应力 

分 类 号：V262[航空宇航科学与技术—航空宇航制造工程]