Effect of different overlap lengths and environmental factors on the mechanical properties of GFRP-al adhesive-riveted hybrid joints

This paper focuses on the adhesive-riveted hybrid joint structure and explores how varying overlap lengths and environmental conditions influence the joint’s mechanical properties. The results indicate that increasing the overlap length progressively enhances the joint’s strength and resistance to impact. In addition, the study explores the changes in joint performance under different environmental conditions. It was found that the impact of a 40°C/75% RH humid environment is significant, with the failure load decreasing by approximately 7.65%. In contrast, under a 70°C high-temperature environment, the joint’s load-bearing capacity decreases significantly by about 30.02%. Finally, through microscopic analysis, it was observed that the humid and high-temperature environments accelerate the aging of the adhesive, and the phenomena of GFRP fiber pullout and fracture become more pronounced.