A lightweight composite with outstanding damping effects and impact resistance is significant for the design of functional structures in advanced equipment, such as aircraft and space vehicles. In this paper, the mechanical properties of solution-blended graphene nanoplatelets (GNPs)/polyether-ether-ketone (PEEK) nanocomposites were characterized by both experimental and numerical methods. It can be found that the layer number and packing configuration of graphene layers are critical to the efficiency of energy dissipation in the composite, while a pack of six- layer graphene and the perpendicular arrangement to the shockwave direction provide the most outstanding energy dissipation ability. The reflection of shockwave caused by graphene reinforcements in the nanocomposite was found to be the dominating reason for the enhanced energy dissipation effect. Physical mechanisms of energy dissipation are investigated by a molecular modeling method to provide insights into the cross-scale design of graphene-reinforced nanocomposites as structural materials.

中文翻译：

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溶液混合石墨烯纳米片/聚醚-醚-酮纳米复合材料的机械性能

具有出色阻尼效果和抗冲击性的轻质复合材料对于飞机和航天器等先进设备的功能结构设计具有重要意义。在本文中，溶液混合石墨烯纳米片（GNP）/聚醚-醚-酮（PEEK）纳米复合材料的机械性能通过实验和数值方法进行了表征。可以发现，石墨烯层的层数和堆积配置对复合材料中的能量耗散效率至关重要，而六层石墨烯的堆积和垂直于冲击波方向的排列提供了最出色的能量耗散能力。发现纳米复合材料中石墨烯增强材料引起的冲击波反射是增强能量耗散效果的主要原因。通过分子建模方法研究了能量耗散的物理机制，以深入了解作为结构材料的石墨烯增强纳米复合材料的跨尺度设计。