Dragonfly's wings are highly specialized flying organs that are well adapted to the flying behavior of each dragonfly, mainly consisting of veins and membrane. The effect of graphene nanoparticles on a novel foam-based sandwich panel structure inspired by microstructural features of dragonfly wings has been investigated under low-velocity impact. Composite and nanocomposite sandwich veins are made of E-glass/epoxy layers, in which different percentages of graphene nanoparticles are combined with its resin. Polyurethane foam was also used for its core. According to the performance of the samples made after testing and cutting the samples in transverse and longitudinal directions, the internal structure of the vein was examined. Sandwich panels with this type of structure under impact can prevent damage propagation in the vein. The sandwich structure with 0.3% nano indicated more stable behavior in energy absorption and impact resistance than other samples.

中文翻译：

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低速撞击下石墨烯纳米粒子对蜻蜓翅膀启发的夹心结构强度的影响

蜻蜓的翅膀是高度专业化的飞行器官，能很好地适应每只蜻蜓的飞行行为，主要由脉和膜组成。在低速冲击下研究了石墨烯纳米粒子对受蜻蜓翅膀微观结构特征启发的新型泡沫夹心板结构的影响。复合材料和纳米复合材料夹心静脉由 E 玻璃/环氧树脂层制成，其中不同百分比的石墨烯纳米颗粒与其树脂结合。聚氨酯泡沫也用于其芯材。根据样品在横向和纵向上测试和切割后制成的样品的性能，检查静脉的内部结构。在冲击下具有这种结构的夹心板可以防止损伤在静脉中传播。