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

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (17) : 101-110.

ZHAO Zhujie, HOU Hailiang, LI Dian, XIA Xichi

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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

Key words

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

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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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