复合材料机翼下壁板对接区设计与分析

摘要

机翼对接设计是飞机结构设计的一个重要环节。其设计的好坏关系到飞机的飞行性能和使用安全性能。基于国外先进民用客机外翼与中央翼的对接结构形式，设计了两种复合材料机翼下壁板的对接形式，并对其连接强度和失效模式进行了研究。利用商业有限元软件ABAQUS结合内聚力单元模型，模拟壁板蒙皮／缘条界面的失效，并获得不同对接形式构件的脱胶起始位置：通过引入Hashin失效准则的有限元模型研究拉伸载荷下对接构件的承载能力，并校核了螺栓强度；最后，比较分析了两种构件的最终失效模式，为复合材料关键连接区的细节设计提供一种有效的方法。%The design of wing connection joint is one of the major parts in an aircraft design. The quality of the joints plays an important role in the safe operation and performance of an aircraft. Based on the center- outer wing connection joint design of foreign advanced eivil aircrafts, two joint specimens were designed for eomposite wing lower panels. The bear strength and failure mode of joint specimens were studied. The failure process of the flange/ skin interfaee was simulated by using the cohesive element in the eommereial software ABAQUS. The research re- sults indicated the debonding starting position of different joint speeimens. The bearing eapacity of joint specimens under tensile load and the bear strength of bolts were also researehed. Finally an effective method was suggested for the design of composite key eonnection areas after comparing the ultimate failure mode.