石墨烯增强铝基SiC复合材料的动态失效机理与抗侵彻性能

研究石墨烯增强铝基复合材料的动态力学性能、失效机理以及抗侵彻性能.通过静、动态压缩测试掌握了材料在0.001~5 200.000 s-1应变率范围内的力学性能，揭示了该材料的应变率效应，结合光学显微镜（OM）和扫描电镜（SEM）分析了该材料在静、动态压缩下的断裂机理；通过弹道枪试验掌握了该材料与Q235钢面板层叠构成复合结构及12~18 mm厚Q235A钢板的弹道极限速度及极限比吸收能.试验结果表明，Q235A钢/石墨烯增强铝基复合结构的极限比吸收能是12~14 mm厚度范围Q235A钢板的1.79倍，34.10 mm厚石墨烯增强铝基SiC复合材料的极限比吸收能与16.70 mm厚Q235A钢相当. 

Dynamic Failure Mechanisms and Anti-Penetration Performance of Graphene Reinforced Al/SiC Composite

The dynamic mechanical behaviors, failure mechanisms and anti-penetration performance of graphene reinforced Al/SiC composite were investigated in this paper. The mechanical behaviors of the material under strain rate 0.001~5 200 s^-1 were obtained by static and dynamic compression tests and its strain rate effect was revealed. Furthermore, the fracture mechanisms of graphene reinforced Al/SiC composite under static and dynamic compressive loading were analyzed by optical and scanning electronic microscopy (SEM) observations. In addition, ballistic impact experiments were conducted to acquire the ballistic limit velocity and specific energy absorption of Q235A/graphene reinforced Al/SiC composite structure and Q235A steel plates with thicknesses ranging from 12 mm to 18 mm. The results indicated that the specific energy absorption of Q235A/graphene reinforced Al/SiC composite structure is 1.79 times that of Q235A steel plates with thicknesses ranging from 12 mm to 14 mm, and the specific energy absorption of graphene reinforced Al/SiC composite with the thickness of 34.10 mm is the same as the value of Q235A steel plate with the thickness of 16.70 mm.