Abstract: Based on the experimental verification of the feasibility of the simulation model, numerical simulation methods are used to explore the influence of the composite material layering sequence, the width-to-diameter ratio, end-diameter ratio, and aperture ratio of the hybrid connection structure on the bearing capacity of the titanium alloy-composite double-bolt hybrid bolted/bonded joints on failure load. The research results show that among the commonly used layup sequences, when the layup sequence is [45°/0°/-45°/90°]_3s, the load-bearing capacity of the hybrid connection structure is the best. As the aspect ratio increases, the failure load of the connection structure will gradually increase, but the connection strength will gradually decrease. Within a certain range, an appropriate increase in the end diameter ratio or aperture ratio can increase the carrying capacity of the connection structure, and when it exceeds this range, the carrying capacity of the connection structure will decrease.

Key words: carbon fiber composite materials, hybrid bolted/bonded joints, composite material layering sequeue, end-diameter ratio, width-diameter ratio, aperture ratio