锁铆连接的铝合金蜂窝板组合结构的连接性能研究

Study on the Connection Performance of Aluminum Alloy Honeycomb Plate Composite Structure with Lock Riveting Connection

为研究锁铆连接的铝合金蜂窝板板-杆组合结构的力学性能,对3组锁铆连接的铝合金蜂窝板-杆组合结构进行静力试验分析,探讨蜂窝板、锁铆连接间距等对组合结构受力特性和变形性能的影响。试验表明:铝合金蜂窝板参与网壳结构共同工作后,充分发挥了蜂窝板及铝合金杆件轻质高强的优势,使组合结构的力学性能和变形性能显著提升。铝合金蜂窝板与铝合金杆件之间的有效连接是发挥铝合金蜂窝板及杆件性能的关键,无板组合结构的最终破坏形态为铝合金杆件连接节点处的脆性破坏,而铝合金蜂窝板-杆组合结构的最终破坏形态为在保证锁铆连接件的连接性能时,铝合金杆件断裂后结构仍然能继续承载的延性破坏。同时,不同的连接方式对组合结构有较大影响,相较于传统的抽芯铆钉连接,板-杆采用锁铆连接能有效提高组合结构的整体性,且在结构破坏时不发生锁铆节点破坏,板件仅产生局部屈曲,具有良好的连接性能。此外,锁铆连接间距对铝合金蜂窝板-杆组合结构的承载力和变形性能有较大的影响,在相同连接直径、连接工艺以及相同蜂窝板厚情况下,连接间距越小,组合结构承载力越大。

In order to study the mechanical properties of aluminum alloy honeycomb panel rod combination structures with lock riveting connections,this paper conducted static test analysis on three sets of aluminum alloy honeycomb panel rod combination structures with lock riveting connections,and explored the influence of honeycomb panels,lock riveting connection spacing,etc.on the mechanical characteristics and deformation performance of the combination structure.Experiments have shown that the participation of aluminum alloy honeycomb panels in the joint work of grid shell structures fully utilizes the advantages of lightweight and high-strength honeycomb panels and aluminum alloy members,significantly improving the mechanical and deformation properties of the composite structure.The effective connection between aluminum alloy honeycomb panels and aluminum alloy rods is the key to unleashing the performance of aluminum alloy honeycomb panels and rods.The ultimate failure mode of non-plate composite structures is brittle failure at the connection nodes of aluminum alloy rods,while the ultimate failure mode of aluminum alloy honeycomb panel rod composite structures is ductile failure that can continue to bear the load even after the aluminum alloy rod fractures while ensuring the connection performance of locking and riveting connectors.At the same time,different connection methods have a significant impact on the composite structure.Compared to traditional core pulling rivet connections,plate to rod locking rivet connections can effectively improve the overall integrity of the composite structure,and there is no locking rivet node failure when the structure is damaged.There is only local buckling in plate,which has good connection performance.In addition,the spacing between locking and riveting connections has a significant impact on the bearing capacity and deformation performance of aluminum alloy honeycomb panel rod composite structures.With the same diameter,connection process,and honeycomb panel thickness,the smaller the connection spacing,the greater the bearing capacity of the composite structure.