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Energy-absorption characteristics of tube-reinforced absorbent honeycomb sandwich structure

机译：管增强吸收性蜂窝夹层结构的能量吸收特性

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摘要

Nomex honeycombs are widely used in lightweight structures due to their unique porous structure. By adding an absorbent agent to Nomex honeycomb wall and filling carbon fiber reinforced polymer (CFRP) tube, a novel tube-reinforced absorbent honeycomb sandwich structure was proposed. Its compressive properties and energy absorption characteristics were studied experimentally and numerically. Compared with empty absorbent honeycomb, the normalized elastic modulus E, peak stress and energy absorption of tube-reinforced absorbent honeycomb can be increased by 55.74%, 621.69% and 327.86% respectively. Moreover, the energy absorption of the tube-reinforced absorbent honeycomb was increased by 30.34%, compared with the sum of empty absorbent honeycomb and CFRP tube tested separately. The interaction effects and enhancement mechanism between absorbent honeycomb and CFRP tube were also discussed. The excellent electromagnetic absorption and mechanical properties make this novel honeycomb sandwich structure much more competitive not only in electromagnetic wave stealth application but also in load-carry structures.
机译：由于其独特的多孔结构，Nomex蜂窝广泛用于轻质结构。通过向Nomex蜂窝壁添加吸收剂和填充碳纤维增强聚合物（CFRP）管，提出了一种新型管增强吸收性蜂窝夹层结构。实验和数值研究其压缩性能和能量吸收特性。与空吸收剂蜂窝相比，管增强吸收剂蜂窝状的归一化弹性模量E，峰值应力和能量吸收可分别增加55.74％，621.69％和327.86％。此外，与分别测试的空吸收性蜂窝和CFRP管的总和相比，管增强吸收剂蜂窝的能量吸收增加了30.34％。还讨论了吸收剂蜂窝和CFRP管之间的相互作用和增强机制。优异的电磁吸收和机械性能使得这款新颖的蜂窝夹层结构不仅在电磁波隐身应用中更具竞争力，而且在负载携带结构中也是如此。

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