Fatigue properties of self‐piercing riveted multi‐rivet joints in steel and aluminum sheets

Du, Guodong; Xing, Yanfeng; Li, X.

doi:10.1002/mawe.201800114

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…The reason is that there is residual stress at the junction of the rivet foot and the aluminum sheet during the riveting process, where the stress concentration is significant. Under cyclic loading, the stress concentration area is prone to plastic deformation, and the repeated cyclic plastic strain causes the extrusion and intrusion of the crystalline metal phase, resulting in slip bands and the final formation of microcrack nuclei [ 44 ]. Once the micro-crack is nucleated, the micro-crack will expand and extend along the slip plane, and the micro-crack will gradually develop into a macro-crack.…”

Section: Resultsmentioning

confidence: 99%

Insight of Salt Spray Corrosion on Mechanical Properties of TA1-Al5052 Self-Piercing Riveted Joint

et al. 2022

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Self-piercing riveted (SPR) joints in automobiles inevitably suffer from corrosion damage and performance reduction. In this work, the influence of salt spray corrosion on the mechanical properties of TA1-Al5052 alloy SPR joints was studied. The TA1-5052 SPR joints were prepared and salt spray tests were carried out for different durations. The static and fatigue strengths of the joints after salt spray corrosion were tested to analyze the effect of salt spray duration on the performance of the joints. The results show that the joints’ static strength and fatigue strength decrease with prolonged salt spray time. The salt spray duration affects the joint’s tensile failure mode. The tensile failure without corrosion and with a short salt spray time is the fracture failure of the lower aluminum sheet, and the tensile failure of the joints after a long time of salt spray corrosion is the failure of the rivets. The fatigue failure form of the SPR joint is the formation of fatigue cracks in the lower aluminum sheet, and salt spray time has little effect on the fatigue failure form. Salt spray corrosion can promote the initiation and propagation of fatigue cracks. The fatigue crack initiation area is located at the boundary between the lower aluminum sheet and the rivet leg. The initiation of cracks originates from the wear zones among the sheet metal, rivets, and salt spray particles.

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Section: Resultsmentioning

confidence: 99%