变刚度复合材料加筋壁板的压缩试验及仿真研究OA

The curved fiber composites can be applied in the industry thanks to the automated fiber placement,however,the benefit of the curved fiber stiffened laminates has not been proved adequately by experimental data.The compression behavior of straight fiber stiffened laminates were compared with the curved fiber stiffened laminates,the skins were manufactured with the automated fiber placement processing,and then they were cocured with the cured I-shaped stringers,finally the two types of stiffened laminates were tested under compression.Results show that the straight fiber stiffened laminates failed at an average compressive load of 116.27kN,compared with a load of 151.62kN of the curved ones.It is found that the debonding firstly happens as the buckling of the skin in the case of straight fibers,then the stringer failed and it leads to the final failure of the whole structure.The curved fiber stiffened laminates show a similar behavior that a debonding exist and it leads to the stringer's crush.However,the debonding happened at a high compression load as the curved fiber stiffened laminates has a much higher buckling load.