Abstract:
Objectives To optimize the performance of composite material connection structures, this study investigates the ultimate strength and progressive failure process of large composite connectors.
Method Focusing on the bolted connection structure between a steel base of certain equipment on a ship and a composite stiffened plate, the research examines ultimate strength and material damage from both structural testing and numerical simulation.
Results The testing results show that the structure reaches its load-bearing capacity limit when the bending moment reaches 50.92 kN·m, while the ultimate bending moment obtained from numerical simulation is 52.86 kN·m. The primary failure mode of the structure is the debonding of the adhesive layer at the connection between the hat shape stiffener and the honeycomb panel. At the bolted connection area, fiber breakage and matrix cracking occur in the honeycomb panel.
Conclusion The study indicates that the adopted progressive damage analysis method can effectively simulate the failure process of complex connection structures.
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