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采用真空导入成型工艺,制备出双向纤维腹板增强复合材料夹层板。在四边简支条件下,对无腹板增强、不同腹板高度和间距的试件进行了集中加载实验,研究其受弯承载力、破坏形态等。结果表明:用双向纤维腹板来增强复合材料夹层板,可显著提高试件承载能力,还能有效减缓面层的剥离破坏;与此同时,腹板高度和间距的减小能减缓面板剥离现象;随着腹板高度增加和腹板间距减小,抗弯能力得到显著提高;增加腹板高度还能有效减小夹层板跨中挠度,但腹板间距对跨中挠度的影响并不明显。
Using vacuum induction molding process, prepared a two-way fiber web reinforced composite sandwich panels. Under the condition of simple support on four sides, the specimens with no web reinforcement, different web height and spacing were tested intensively to study the flexural capacity and the failure mode. The results show that the use of bifacial fiber webs to reinforce composite sandwich panels can significantly improve the bearing capacity of the specimens and also effectively reduce the peeling failure of the surfacing layers. At the same time, the decrease of web height and spacing can reduce panel peeling ; As the web height increases and the web spacing decreases, the bending resistance is significantly improved; increasing the web height can also effectively reduce the mid-span deflection of the sandwich panel, but the web spacing has no obvious effect on the mid-span deflection.