Effect of Assembly Gap and Gasket Material on Mechanical Properties of Carbon Fiber Reinforced Composite Bond-Riveted Joints
Carbon fiber reinforced composite(CFRP)bond-riveted joint was prepared,and single seam tensile shear test was carried out.The effects of assembly gap(0,0.3,0.5,1.0 mm)and gasket material(CFRP,alkali-free glass fiber cloth and EP6250 epoxy resin adhesive)on the tensile-shear mechanical properties and failure mode were studied.The results show that the load-displacement curves of the bond-riveted joints with different assembly gaps and gasket materials were similar,which could be divided into elastic stage,interface failure stage,rivet stress stage and rivet head pulling stage.With the increase of the assembly gap,the ultimate load of the bond-riveted joint with CFRP gasket and fiber cloth gasket decreased,and the ultimate load of the bond-riveted joint with adhesive gasket was basically unchanged.When the assembly gap was 1.0 mm,the ultimate load of the bond-riveted joint with adhesive gasket was the largest.When the gasket material was CFRP or fiber cloth,the failure mode of the bond-riveted joints was cracking of the rubber surface on the side of the gasket;when the gasket material was the adhesive,the failure mode of the bond-riveted joint was cracking in CFRP plates.
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