负泊松比内凹蜂窝结构梯度设计与动态冲击响应

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摘要根据负泊松比内凹蜂窝结构的变形机理，提出了一种变截面内凹蜂窝结构构型，利用ABAQUS研究了三维结构的动力学特性，分析了变截面负泊松比蜂窝结构在准静态压缩时的变形模式，并进行了实验验证，实验结果与有限元吻合良好。讨论了在不同冲击速度下梯度变截面内凹蜂窝结构的能量吸收性能，结果表明在中低速下双向负梯度的能量吸收效果优于其他三种结构。所得结果为研究负泊松比力学超结构在动态冲击作用下的能量吸收提供了参考。

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	张晓楠1
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	晏石林1
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	欧元勋1
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	文聘1
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关键词 ：负泊松比, 蜂窝结构, 梯度, 能量吸收, 动态冲击

Abstract：According to the deformation mechanism of auxetic re-entrant honeycomb structure, an auxetic re-entrant honeycomb structure with variable cross section is proposed. The dynamic characteristics of the three-dimensional structure were studied using ABAQUS, and the deformation mode of auxetic re-entrant honeycomb structure with variable cross section under quasi-static compression was analyzed and verified by experiments. The experimental results are in good agreement with the finite element method. The energy absorption performance of auxetic re-entrant honeycomb structure with the gradient variable cross section under different impact velocities was discussed. The results show that the energy absorption performance of bidirectional negative gradient honeycomb structure is found to be the best compared to the other three structures at different specific impact velocities. The conclusion provides a reference for studying the energy absorption of auxetic metamaterial under dynamic impact.

Key words： Negative Poisson's ratio honeycomb structure gradient energy absorption dynamic impact

收稿日期: 2021-12-20 出版日期: 2023-02-15

引用本文:

张晓楠1,2，晏石林1,2，欧元勋1,2，文聘1,2. 负泊松比内凹蜂窝结构梯度设计与动态冲击响应[J]. 振动与冲击, 2023, 42(3): 193-198.
ZHANG Xiaonan1,2, YAN Shilin1,2, OU Yuanxun1,2, WEN Pin1,2. Gradient design and dynamic impact response of concave honeycomb structures with negative Poisson’s ratio. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(3): 193-198.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I3/193

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