Abstract: Since light weight is desirable for the development of ships, carbon fiber reinforced composite materials and bonding technology have received widespread attention from the shipbuilding industry. The CFRP laminate bonding structure combining carbon fiber reinforced plastic and bonding technology is a typical form, and its mechanical behavior is vital to the safety of ship structure. Based on the mechanical experiments and finite element simulation, the geometrical model, theoretical model and finite element model of the CFRP laminate bonding structure were built, and its ultimate bearing capacity and damage behavior were investigated. The results show that the numerical simulation results using the cohesive zone model are in good agreement with the mechanical tests, which can effectively distinguish the linear segment from the nonlinear one. The bonding region is the weak link of the CFRP laminate single-lap structure. The failure behavior of CFRP laminated adhesive plate is complicated, and there are various failure modes such as cohesive failure, adhesion failure and adherence failure in the bonding area. This work is useful for the study of the mechanical properties of complex FRP bonded structures.

Key words: cohesive zone model, CFRP, mechanical behavior, failure mode