In this study, experimental investigations are implemented to evaluate the effect of incorporation of graphene nanoplatelets (GNPs) on the low-velocity impact behavior of composites and fiber metal laminates (FMLs). The hand layup technique is employed to fabricate composite specimens and FML panels with 2/1 configuration. Impact response and damage patterns of unmodified and modified specimens subjected to various impact energy levels are compared. The results reveal that the incorporating 0.2 wt% of GNPs strengthens the impact resistance of FMLs so that the modified panels possess higher bending stiffness, peak load, energy absorption and SEA compared to the unreinforced ones. Visual inspections and SEM images exhibit that the inclusion of GNPs enhances the adhesion between resin/fibers as well as composite plies, thereby reducing damage area and increasing penetration threshold of FMLs. In addition, reinforcing composite panels considerably improves the impact behavior in comparison with the unmodified composites.

在本研究中，实施实验研究以评估石墨烯纳米片 (GNP) 的掺入对复合材料和纤维金属层压板 (FML) 的低速冲击行为的影响。手糊技术用于制造具有 2/1 配置的复合样品和 FML 面板。比较了不同冲击能量水平下未改性和改性试样的冲击响应和损伤模式。结果表明，加入 0.2 wt% 的 GNP 增强了 FML 的抗冲击性，因此与未增强的面板相比，改性面板具有更高的弯曲刚度、峰值载荷、能量吸收和 SEA。目视检查和 SEM 图像表明，包含 GNP 增强了树脂/纤维以及复合层之间的粘合力，从而减少损伤面积并提高 FML 的穿透阈值。此外，与未改性的复合材料相比，增强复合板显着改善了冲击性能。