Study on the Design Method of Ring Groove Rivet Joint in Aluminum Alloy Structure

In this paper, the influence of the two main parameters of end distance and edge distance on high strength aluminum alloy ring groove rivet node failure mode, load–displacement curve and other mechanical property are studied. Many FEMs (finate element model) are established by ABAQUS software for comparative analysis under different parameters. The FEM analysis results showed that the high-strength aluminum alloy ring-groove rivet connection is the pressure-bearing connection. Compared with the bolt connection, the high-strength aluminum alloy ring-groove rivet connection has good ductility, and the yield platform of the load–displacement curve is longer. The failure forms of high-strength aluminum alloy ring-groove rivet connection mainly include rivet shear failure, plate cross-section tearing and longitudinal section tearing failure. In order to avoid the above-mentioned damage, the recommended value of the edge distance is 2d₀, and the end distance is recommended to take the value 2.5d₀. Under the action of shear force, the stress stage of the high-strength aluminum alloy ring-groove rivet connection can be divided into four stages: friction, slippage, pressure bearing and strengthening; The shear and compressive bearing capacity of rivets under the two connection modes of single cover plate overlap and double cover plate butt joint is studied by changing the value of different d/t ratio. Based on the relevant calculation formulas in the European aluminum alloy design code, the shear and compressive bearing capacity correction formulas suitable for the connection of domestic high-strength aluminum alloy rivets are derived. The research provides a reference basis for the ring-groove rivet connection of aluminum alloy nodes and improves the design specifications of aluminum alloy structures.