双箭头负泊松比材料与结构抗冲击防护性能及应用

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (22) : 241-247.

论文

闫鹏，赵桂平

作者信息 +

Protection properties and application of the materials with double arrowhead negative Poisson’s ratio and structures under impact loading

YAN Peng,ZHAO Guiping

Author information +

文章历史 +

摘要

双箭头蜂窝(Double arrowhead honeycombs，DAH)结构具有负泊松比特性，是力学超材料的一种。本文采用有限元数值模拟对不同相对密度的DAH材料吸能特性进行分析，发现随着相对密度增加DAH材料的比吸能指标逐渐下降。通过建立DAH缓冲材料防护结构碰撞模型研究其在撞击刚性地面的过程中具有负泊松比的DAH对结构冲击能量的吸收及对内部物体动态响应的消减。结果表明，DAH缓冲材料能够吸收冲击过程中大量能量，使得内部被保护物体动态响应幅值减小。同时，给出了不同相对密度DAH缓冲材料防护结构在碰撞时临界速度的确定方法。

Abstract

Double arrowhead honeycombs(DAH) material is one of mechanical metamaterial with negative Poisson’s ratio. The energy absorption of DAH’s with different relative densities is explored by using numerical simulations. It can be found that the specific energy absorption of DAH material decreased with the increase of relative density. A collision model for protective structures with DAH cushion material is established to study the impact energy absorption of the structures and dynamic responses attenuation of inner objects during process of colliding with the rigid ground. The results show that DAH cushion material can absorb a large number of impact energy so that the peak value of the dynamic responses of the inner structure protected is reduced. Meanwhile, the critical impact velocity of the protective structures with DAH cushion material during collision is proposed.

导出引用

闫鹏，赵桂平. 双箭头负泊松比材料与结构抗冲击防护性能及应用[J]. 振动与冲击, 2023, 42(22): 241-247

YAN Peng,ZHAO Guiping. Protection properties and application of the materials with double arrowhead negative Poisson’s ratio and structures under impact loading[J]. Journal of Vibration and Shock, 2023, 42(22): 241-247

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