Effect of Riveting Angle and Direction on Fatigue Performance of Riveted Lap Joints

Riveting is the most commonly used connection method in aircraft assembly, and its quality has a crucial effect on the fatigue performance of aircraft. Many factors affect the riveting quality, among which the influence of the riveting angle and direction is not clear. In this paper, a three-dimensional finite element model of single-rivet lap joints is established and verified by the driven head geometry and the riveting force data obtained from the riveting experiments. Then, by adjusting the angle and direction of the punch in the finite element model, the riveting process is simulated at the angles of 0 degrees, 1 degrees, 2 degrees, and 3 degrees and the directions of 0 degrees and 180 degrees to investigate the deformation of the lap joints, the stress distribution around the hole, and the stress distribution of the rivet. Finally, the fatigue tests of the single-rivet lap joints are performed and the influence of the riveting angle and direction on the connection quality and fatigue performance of the riveting joints is analyzed.

铆接是飞机装配中最常用的连接方法，其质量对飞机的疲劳性能有着至关重要的影响。许多因素都会影响铆接质量，其中铆接角度和方向的影响尚不明确。本文建立了单铆钉搭接接头的三维有限元模型，并通过铆接实验获得的镦头几何形状和铆接力数据对其进行了验证。然后，通过在有限元模型中调整冲头的角度和方向，在0度、1度、2度和3度的角度以及0度和180度的方向上模拟铆接过程，以研究搭接接头的变形、孔周围的应力分布以及铆钉的应力分布。最后，对单铆钉搭接接头进行了疲劳试验，并分析了铆接角度和方向对铆接接头连接质量和疲劳性能的影响。