胞元结构准静态压缩力学行为及吸能特性研究

赵著杰,侯海量,李典,夏习持

振动与冲击 ›› 2022, Vol. 41 ›› Issue (17) : 101-110.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (17) : 101-110.
论文

胞元结构准静态压缩力学行为及吸能特性研究

  • 赵著杰,侯海量,李典,夏习持
作者信息 +

Quasi-static compressive mechanical behavior and energy absorption characteristics of cell structure

  • ZHAO Zhujie, HOU Hailiang, LI Dian, XIA Xichi
Author information +
文章历史 +

摘要

为探究结构构型和规格参数对胞元结构综合力学特性的影响,设计了7种体积相等、结构构型不同的胞元结构,开展了准静态压缩试验,得到了各胞元结构的变形破坏过程和应力应变关系,分析了胞元构型和壁厚变化对结构承载能力及能量吸收性能的影响,结果表明:内凹鼓形、内凹六边形、内凹弧形胞元结构均呈现出宏观负泊松比特性,外凸六边形、外凸鼓形、正方形胞元结构呈现出宏观正泊松比特性,外凸弧形胞元结构呈现出近似零泊松比特性;胞元结构的直立壁面和曲面(折线面)共同承担压缩载荷,直立壁面主要发生失稳变形,曲面(折线面)主要发生弯曲外张变形或弯曲回缩变形,直立壁面的失稳临界载荷和屈曲模式对结构承载力和平台应力起主导作用;在各个宏观正泊松比胞元中,外凸六边形胞元的结构承载能力较强,外凸鼓形胞元的结构吸能特性较好,在各个宏观负泊松比胞元中,内凹弧形胞元的结构承载能力和结构吸能特性均较好。
关键词:胞元结构;准静态压缩;变形破坏模式;宏观泊松比;能量吸收特性

Abstract

In order to investigate the influence of structural configuration and specification parameters on the comprehensive mechanical properties of the cell structure, seven single cell structures with equal volume and different macroscopic Poisson's ratio were designed, quasi-static compression tests were carried out to obtain the stress-strain relationships and deformation/failure modes of each cell structure, and the influence of changes in the cell configuration and wall thickness on the structural bearing capacity and energy absorption performance was analyzed. The results show that the concave bulbous cell, concave hexagonal cell, and concave arc cell exhibit macroscopic negative Poisson's ratio properties, the convex hexagonal cell, convex bulbous cell, and square cell exhibit macroscopic positive Poisson's ratio properties, and the convex arc cell exhibits approximately zero Poisson's ratio properties; the upright wall and the curved surface (folding surface) of the cell structure share the compressive load, the upright wall mainly undergoes instability deformation, the curved surface (folding surface) mainly undergoes bending extensibility deformation or bending retraction deformation, the instability stiffness and flexural mode of the upright wall play a dominant role in the structural bearing capacity and platform stress; among the macroscopic positive Poisson's ratio cells, the convex hexagonal cells have better structural load-bearing capacity and the convex bulbous cells have better structural energy absorption characteristics, and among the macroscopic negative Poisson's ratio cells, the concave arc cell have better structural load-bearing capacity and structural energy absorption characteristics.
Key words: Cell structure; Quasi-static compression; Deformation/failure mode; Macroscopic Poisson's ratio; Energy absorption properties

关键词

胞元结构 / 准静态压缩 / 变形破坏模式 / 宏观泊松比 / 能量吸收特性

Key words

Cell structure / Quasi-static compression / Deformation/failure mode / Macroscopic Poisson's ratio / Energy absorption properties

引用本文

导出引用
赵著杰,侯海量,李典,夏习持. 胞元结构准静态压缩力学行为及吸能特性研究[J]. 振动与冲击, 2022, 41(17): 101-110
ZHAO Zhujie, HOU Hailiang, LI Dian, XIA Xichi. Quasi-static compressive mechanical behavior and energy absorption characteristics of cell structure[J]. Journal of Vibration and Shock, 2022, 41(17): 101-110

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