Design optimization of GFRP-Al hybrid adhesive-rivet joints: Analysis of joining parameters

This study explores how overlap length, adhesive thickness, and stacking angle affect the performance of hybrid adhesive-rivet joints. The findings indicate that extending the overlap length notably improves the failure load, but once it surpasses 20 mm, the increase in load becomes gradual, suggesting a diminishing effect. The increase in adhesive thickness causes the failure load to first increase and then decrease, with the optimal thickness being 0.2 mm. Thicker adhesives lead to stress concentration and increased fiber damage. The stacking angle has a minimal effect on the failure load but significantly impacts the damage distribution. Proper selection of overlap length, adhesive thickness, and stacking angle is crucial for optimizing performance.