Effect of edge riveting on the failure mechanism and mechanical properties of self-piercing riveted aluminium joints

• Published in: Engineering failure analysis Vol. 150; p. 107305
• Main Authors: Duan, Jinrui, Chen, Chao
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.08.2023
• Subjects: Aluminium alloy; Destructive testing; Edge riveting; Failure mechanism; Mechanical property; Self-piercing riveting; Failure mechanism; Edge riveting; Destructive testing; Aluminium alloy; Mechanical property; Self-piercing riveting
• ISSN: 1350-6307; 1873-1961
• DOI: 10.1016/j.engfailanal.2023.107305

•The joint failure mode of edge riveting is a coexistence of rivet pull out and riveted mouth sheet fracture;•The strength of the riveted joint based on the upper sheet was relatively high at the same edge pitch;•The maximum shear load was relatively high for the riveted joint near the upper sheet edge;•The error values for the geometric parameters of the joint near the upper sheet edge were smaller. In order to improve the use of aluminium alloys in lightweight automotive body panels, the failure mechanism and mechanical properties of AA5052 aluminium alloy sheets under different conditions were investigated by means of self-piercing riveting (SPR). The impact of riveting position on the structural strength, absorbed energy and instantaneous stiffness of self-piercing riveted connections was analyzed using the edge riveting method. Four edge distances of 1.65 mm, 2.65 mm, 3.65 mm and 4.65 mm were considered for the experimental study, and the riveted structure was analyzed and tensile shear tests were carried out by comparing the mechanical properties. The results indicated that this riveting method changed the failure mode of the joint, with the rivet pulling out from the lower sheet to a co-existence of rivet pull-out and riveted mouth sheet breakage; the maximum shear load, absorbed energy and deformation resistance decreased as the distance from the riveting point to the strip edge decreased; and the strength of the riveted joint based on the upper plate was significantly greater than that based on the bottom plate at the same edge pitch, and the stability of the joint is superior. This study provides a theoretical basis for the damage suppression of aluminium alloy edge riveted joints and the lightweight production of vehicles.