This paper studies the effect of several design parameters on the impact performance of fully 3D printed sandwich panels with a core cell unit inspired by the trabecular structure of the forewing of a beetle. The key finding is that the asymmetric sandwich panel, which featured a thicker face sheet at the back and a core with a variating cell wall thickness of weak-to-strong, exhibited the highest impact energy dissipation. Specifically, 98.1 J was dissipated with 6970 N of peak load. This surpassed the performance of the sandwich panel with homogeneous cell wall thickness and asymmetric face sheets, which dissipated only 72.1 J and failed at 5406 N. In general, asymmetric configurations were found to dissipate greater energy than symmetric face sheets, and for sandwich plates with homogenous cores, the configuration with the thickest back face sheet proved more resistant to damage than the opposite asymmetric configuration.

中文翻译：

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由 3D 打印连续碳纤维增强聚酰胺整体制造的仿生夹芯板的冲击行为

本文研究了几个设计参数对全 3D 打印夹层板冲击性能的影响，该夹层板的核心单元单元受到甲虫前翅小梁结构的启发。关键发现是不对称夹芯板的背面具有较厚的面板和具有从弱到强变化的单元壁厚度的芯材，表现出最高的冲击能量耗散。具体来说，峰值负载为 6970 N 时消耗了 98.1 J。这超过了具有均匀单元壁厚度和不对称面板的夹芯板的性能，该夹芯板仅耗散 72.1 J，并在 5406 N 时失效。一般来说，发现不对称配置比对称面板耗散更大的能量，并且对于具有在同质芯材中，具有最厚背面板的配置被证明比相反的不对称配置更能抵抗损坏。