Experimental Study of Flexural Behavior of Composite Sandwich Panel Reinforced by Two-Way Webs
双向纤维腹板增强复合材料夹层板受弯性能实验研究

Composite sandwich panel reinforced by two-way webs was prepared by vacuum infusion molding process (VIMP). Under the condition of four edges simply supported, concentrated load experiment was carried out for specimen without webs, with webs with different height and different spacing, respectively, to investigate its flexural capacity and failure mode. Results show that composite sandwich panel reinforced by two-way webs has greatly improved specimen carrying capacity and effectively slowed down the debonding of surface layer. At the same time, the web height and spacing decrease can reduce the layer debonding. The flexural capacity has greatly improved with the web height increase and web spacing decrease. The increase of web height can effectively reduce the deflection in the cross of sandwich plate, but the web spacing basically has no influence on the deflection in the cross of sandwich plate.