BUCKLING RESPONSE OF REINFORCED COMPOSITE STIFFENED PANEL WITH COVER IN SHEAR LOAD

摘要

This paper presents the results from a numerical study of the initial buckling and postbuckling responses of unreinforced and 9 reinforced composite stiffened panel with cover in shear load. The effects of reinforcement size, reinforcement thickness and cover thickness was examined using Finite Element Analysis (FEA) simulations. The simulation results suggest that the cover area buckles at a higher load than the outer skin area and the reinforcement configuration can increase the load-carrying capacity of the panels. Furthermore, the efficiency of the reinforcement configuration was investigated, which indicated that the efficiency of the reinforcement configuration decreases with the increase of the reinforcement size and thickness. Also, the efficiency of the cover thickness is highly dependent on the reinforcement thickness. To assess the reliability of the present numerical model, the numerically predicted results are compared with the experimental results. It turns out that the numerical analysis shows good agreement with experimental results. Potentially, the findings in this study can offer help to the analysis and design of composite stiffened panel with cover.