INFLUENCE OF DISTRIBUTION TYPES OF RIVETS ON THE MECHANICAL PROPERTIES OF SELF-PIERCING RIVETING JOINTS

The mechanical properties of self-piercing riveted (SPR) joints in aluminum alloy 5052 were measured by Landmark tester to investigate the influence of distribution types of rivets on the mechanical properties of SPR joints. The static and fatigue properties of SPR joints with single-rivet (SR), transverse double-rivet (DRT) and longitudinal double-rivet (DRL) were obtained, and the effectiveness of experimental data was analyzed by Normal Distribution and Weibull Distribution. The results show that the static strength of a DRT joint is about two times of that of a SR joint. The static strength of a DRL joint is about 1.9 times of that of the SR joint. The DRL joint has better energy absorption capacity than that of the DRT joint. The fatigue properties of SPR joints with double-rivet are superior to that of the SR joint. The distribution types of rivets have little effect on the fatigue deformation of joints, but great effect on fatigue life. When the fatigue load is high, the fatigue life of the DRL joint can be improved. With the decrease of the fatigue load, the fatigue life of the DRT joint can be increased markedly.