Abstract
Two kinds of self‐piercing riveted (SPR) joints were prepared with DP590 and AA6061 plates. The forming qualities of the joints were studied using the finite element method. The relationships between the fatigue life and failure forms of the joints with different upper plates were discussed. Finally, the failure mechanisms of the joints were analyzed. The results show that the maximum static tension of DA32 joints (with an upper plate of DP590) is significantly greater than that of the other kind, and the fatigue life of DA32 joints is always longer than that of AA40 joints when with a 2.0 mm thick AA6061 aluminum alloy upper plate under the same fatigue load. The failure mode of SPR joints changes obviously due to different upper plates, and the fatigue life of the joints can be effectively improved by reducing the microvibration wear.
Highlights
Due to the increasingly strict requirements of environmental protection and energy-saving, lightweight technology has drawn much attention in the development of the automobile industry
According to the selfpiercing riveting quality evaluation parameters, the longer the self-locking length, the better the riveting quality of the self-piercing riveted (SPR) joints. erefore, whether the self-piercing riveting test or finite element simulation of self-piercing riveting, it can be preliminarily judged that the self-piercing riveting quality of DA32 joints is better
It is suggested that there is a positive correlation between the mechanical property of the SPR joint and its self-locking length
Summary
Due to the increasingly strict requirements of environmental protection and energy-saving, lightweight technology has drawn much attention in the development of the automobile industry. Spot welding technology does not apply to the connection of light alloy or different materials [6]. As a new cold connection technology, selfpiercing riveting uses rivets to join the upper plate and lower plate under the effect of rivet die without piercing the connected lower plate. Selfpiercing riveting connection technology can well solve the shortcomings mentioned above and can realise the effective connection between light alloy or different material parts [9]. At present, it has become one of the most important manufacturing processes for body board connections [10]
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