玻璃纤维增强环氧树脂复合材料的弯曲性能及破坏特征

Bending Properties and Failure Characteristics of Glass Fiber Reinforced Epoxy Resin Composites

以单向玻璃纤维/环氧树脂预浸料和一种平纹玻璃纤维/环氧树脂预浸料压制的环氧玻璃钢为研究对象,对其进行弯曲试验,并对比分析了试样的弯曲强度。结果表明:对于单向纤维单角度的铺设方式,0°纤维试样具有更高的弯曲强度;对于单向纤维交叉的铺层方式,0°纤维与90°纤维交替铺层的试样具有更高的弯曲强度;对于不同的铺层方式,0°纤维置于最外侧试样的弯曲强度高于90°纤维置于最外侧试样的弯曲强度;单向玻璃纤维试样的弯曲强度略高于平纹玻璃纤维试样的。

Taking the epoxy glass fiber reinforced plastic pressed by unidirectional glass fiber/epoxy resin prepreg and a plain glass fiber/epoxy resin prepreg as the research object, the bending tests were carried out, and the bending strength of samples were compared and analyzed. The results show that for the laying mode of unidirectional fiber and single angle, the 0° fiber sample has higher bending strength. For the unidirectional fiber cross ply, the specimens with 0° fiber and 90° fiber alternating ply have higher bending strength. For different lamination methods, the bending strength of the specimen with 0° fiber placed on the outermost side is higher than that of the specimen with 90° fiber placed on the outermost side. The bending strength of unidirectional glass fiber specimen is slightly higher than that of plain glass fiber specimen.