首页|Failure behavior of electromagnetic driven nailing riveted joint for Al/steel structures subjected to fatigue loading
Failure behavior of electromagnetic driven nailing riveted joint for Al/steel structures subjected to fatigue loading
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NSTL
Elsevier
Electromagnetic high-speed nailing (E-HSN) has wide application prospect due to the advantage of high flexibility, unilateral operation and excellent performance. In this paper, the fatigue behavior of E-HSN joints with the aluminum alloy 5052 (Al)/high-strength steel DP590 (HSS) structure was systematically studied. The fatigue tests were conducted and Basquin equation was used to fit the fatigue data. Fatigue fracture were observed. The results showed that the joint had two typical fatigue failure modes. The cyclic stress of 253 MPa was the critical point of two failure modes. The rivet shank fractured under a higher cyclic stress (mode 1, over or equal to the critical point) and rivet head fractured under a lower cyclic stress (mode 2, below the critical point). Moreover, the fracture appearance was analyzed to reveal the failure mode and mechanism of the joints. The quasi-cleavage fracture in the fatigue fracture mode 1 was characterized by ductile and brittle mixed fracture. For the fatigue fracture mode 2, cleavage cracks appeared cleavage fan shape due to the large-angle grain boundary. Finally, based on the damage evolution model, the fatigue life prediction values of E-HSN joints were obtained. The predicted results were basically distributed within 2 times error band, which showed good accuracy and consistency.
NSTL
Elsevier
