Composite structures has been rapidly developed and broadly used in engineering field.A mount of mechanical connections still exist in composite structures,and are used in the most dangerous places to improve their security and economic efficiency.Aiming at this,it investigates connection units of bolts between aluminum alloy and composite laminates under tension load,analyzes a single-lap model with four bolts in Patran/Nastran FEM software,obtains the pin-load distribution,stress-strain distribution and stress concentration corresponding to all four connection models.The results are helpful for modeling and analyzing composite-metal connecting structures.%由于整体制造困难等原因,复合材料结构件之间存在大量的机械连接,连接处往往是结构关键危险部位,因此提高连接区安全性和经济性十分必要.基于此,以承受单向拉伸载荷的铝合金与复合材料层合板连接结构为研究对象,针对四螺栓单搭接结构模型,采用Patran/Nastran有限元软件对比分析了4种常用连接单元模型,分别获得了各种连接单元模型连接结构钉载分配、应力应变分布以及应力集中情况,分析结果对复合材料连接结构建模和分析有一定的参考意义.
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