Effect of Rivet Height on Performance of Adhesive-rivet Composite Joints
The DC04 steel plate with thickness of 1 mm and the 5052 aluminum alloy plate with thick-ness of 2 mm were taken as the riveting objects,and the structural adhesive with thicknesses of 0.1 mm,0.2 mm,0.3 mm was added between the two plates.The self-pierce riveting joints were prepared with rivets of 4 mm,5 mm,6 mm height,respectively.The failure forms were analyzed by tensile shear test,and the cross-sectional shape of different joints was observed.The effect of adding structural adhesive on the corrosion resistance of the joints was studied by electrochemical corrosion test.The experimental results show that when the rivet height is certain,the tensile shear strength of the joint with an adhesive thickness of 0.1 mm is the largest,and the increase in the adhesive thickness decreases the internal locking value of the joint.Different heights of rivets will cause different failure forms of joints,and the main failure form of 4 mm high rivet joints is the separation of the upper and lower plates after the fail-ure of the adhesive layer;5 mm high rivet joints fail in the form of rivets out of the lower plate;6 mm high rivet joints fail in the form of tearing of the upper plate and the rivets out of the upper plate failure.Adding structural adhesive can improve the corrosion resistance of the joint,and with the increase in ad-hesive thickness,corrosion resistance also increases.
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