碳纤维/环氧预浸布耐折叠性能研究

Research on folding properties of carbon fiber/epoxy preimpregnated cloth

针对碳纤维/环氧预浸布复合材料的耐折叠性能特点,进行了不同折叠半径和不同折叠时间力学性能的对比实验.选定折叠时间为4h,折叠半径取0-4mm.再以折叠半径0.5mm为条件,取折叠时间为1-4h.对不同折叠条件下的试件进行拉伸性能试验、从而得出不同折叠半径,不同折叠时间对复合材料预浸布性能的影响.实验结果表明:折叠造成了复合材料增强纤维的损伤和树脂的堆积,引起了拉伸性能的下降,折叠半径越小、折叠时间越长,碳纤维/环氧预浸布薄膜复合材料强度下降越严重.

The comparison experimental research under different folding radius and folding time was carried out on folding-resisting properties of carbon fiber/epoxy preimpregnated cloth coextruded film materials. When folding time was controlled as 4 hours, folding radius was adopted from 0 to 4 mm. However, when folding radius was controlled as 0.5mm, folding time was adopted from 1 to 4 hours. Tensile properties testing was conducted on these different specimens, and the effects of folding radius and folding time on preimpregnating ability of composite were analyzed. Results showed that folding resulted in the damage of strengthening fibers and the piling up of resin in composite materials, which depressed the tensile properties. The smaller the folding radius was, and the longer the folding time lasted, the more greatly the strength of carbon fiber/epoxy preimpregnated cloth coextruded film materials was decreased.