温度对复材与金属混合结构钉载分配的影响

Influence of Temperature on Nail Load Distribution of Composite and Metal Structures

层合板复材与金属连接混合结构已经大量应用于飞机机身和机翼的设计之中。连接部位往往是结构最危险部位,如何提高连接部位的安全性已经成为飞机设计人员关切的主要问题之一。鉴于此,以承受拉伸载荷的层合板和铝合金连接结构为研究对象,针对五螺栓单剪搭接及双剪对接结构模型,同时考虑温度载荷、数值仿真温度对复材与金属混合结构钉载分配的影响。仿真结果表明:复材与铝合金混合结构钉载分配呈U形分布,中部低,两侧高;温度载荷对两侧钉载分配影响较大。分析结果对复材与金属搭接设计具有一定的参考意义。

The hybrid structure of composite laminates and metal connections has been widely applied in the design of aircraft fuselage and wings. The location of connections is often the most dangerous part of the structures. How to improve the safety of joint has become one of the main concerns of aircraft designers. In view of this, taking laminate structure and aluminum alloy connection structure subjected to tensile load as the research object, aiming at the structural model of five-bolt single lap and double lap, considering the temperature load at the same time, the influence of temperature on the nail load distribution of hybrid structure of composite and metal is numerically simulated. The simulation results show that the nail load distribution of the hybrid structure of composite and aluminum alloy is U type. The middle part is low, and the two sides are high. The temperature load has great influence on the nail load distribution on both sides. The analysis results have some certain reference significance for the lap design of composite and metal.