双向角度梯度内凹蜂窝结构的面内倾斜冲击性能研究

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摘要基于典型内凹蜂窝负泊松比蜂窝结构，设计了一种具有角度梯度分布的新型内凹负泊松比蜂窝结构，建立了双向递增和双向递减两类角度梯度变化的内凹蜂窝有限元模型。对典型负泊松比蜂窝结构和双向角度梯度蜂窝结构的吸能效果进行了准静态实验研究对比。通过有限元软件ABAQUS/Explicit，研究了面内倾斜冲击载荷作用下两类角度梯度内凹蜂窝结构的变形模式、平台应力和能量吸收特性。计算结果表明：当冲击倾角为2°，角度梯度值为3°的新型角度梯度蜂窝结构具有较高的平台应力和良好的能量吸收模式。

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	刘海涛1
	2
	安明冉1
	王梁1
	乔国朝1
	任富光1

关键词 ：角度梯度内凹蜂窝结构, 面内倾斜冲击, 负泊松比效应, 平台应力, 能量吸收

Abstract：Based to the typical re-entrant honeycomb structure with negative Poisson's ratio, a new type re-entrant honeycomb structure with negative Poisson's ratio and angle gradient was designed. The finite element model of re-entrant honeycomb structure with two kinds of angle gradient changes, namely bidirectional increasing and bidirectional decreasing, was established. A quasi-static experiment was carried out to compare the energy absorption effect of typical honeycomb structures with negative Poisson's ratio and re-entrant honeycombs structure with bidirectional angle gradient. The deformation mode, platform stress and energy absorption characteristics of two types of re-entrant honeycomb structures with angle gradient under in-plane inclined impact loading were studied by using finite element software ABAQUS/Explicit. The results show that when the impact angle is 2° and the angle gradient is 3°, the new type gradient structure has higher platform stress and better energy absorption mode.

Key words： re-entrant honeycomb with angle-gradient in-plane inclined impact negative Poisson’s ratio effect platform stress energy absorption

收稿日期: 2020-08-07 出版日期: 2021-12-15

引用本文:

刘海涛1,2，安明冉1，王梁1，乔国朝1，任富光1. 双向角度梯度内凹蜂窝结构的面内倾斜冲击性能研究[J]. 振动与冲击, 2021, 40(23): 159-165.
LIU Haitao1,2, AN Mingran1, WANG Liang1, QIAO Guochao1, REN Fuguang1. In plane oblique impact performance of concave honeycomb structure with bidirectional angular gradient. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(23): 159-165.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I23/159

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