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利用NYL-200D型压力实验机和落锤装置对圆筒形碳纤维增强环氧树脂基复合材料结构进行了准静态和动态冲击压缩实验。在试件端部加粗的准静态压缩实验中,无填充物试件失效模式主要体现为纤维分层,表面产生褶皱,含填充物试件失效模式主要体现为试件环向膨胀导致外表面纤维分层,产生拉伸断裂。在试件端部未加粗的落锤压缩实验中,失效由试件相对薄弱一端开始,薄弱端纤维层逐渐发生分层失效,分别向筒壁内外发生卷曲,并伴随纤维丝断裂,最终在破坏端形成花瓣状。在所进行的静态、动态压缩实验中试件破坏模式主要体现为纤维分层,未发生剪切破坏和整体结构坍塌现象,因此增加环氧树脂基体与碳纤维增强相间的界面结合强度,可提高复合材料结构抗压能力。
The experiment of quasi-static and dynamic impact compression of cylindrical carbon fiber reinforced epoxy resin matrix composites was carried out by using NYL-200D pressure tester and drop weight device. In the quasi-static compression experiments with thicker specimens, the failure modes of the non-filled specimens were mainly manifested as the delamination of the fibers and the generation of wrinkles on the surface. The failure modes of the specimens containing the filler were mainly manifested as the annular expansion of the specimen caused the outer surface Fiber stratification, resulting in tensile fracture. In the unwrapped drop weight test at the end of the specimen, the failure started from the relatively weak end of the specimen, and the weak-end fiber layer gradually delaminated. Curling occurred inside and outside the cylinder wall with the break of the filament, Destroy the formation of petal-like side. In the static and dynamic compression experiments, the failure modes of the specimens are mainly manifested as fiber delamination, no shear failure and collapse of the whole structure, so the interfacial bonding strength between the epoxy resin matrix and the carbon fiber reinforced phase can be increased, Material structure compression capacity.