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This paper investigated the compressive mechanical properties of antitetrachiral honeycombs with different thickness ratios of ligament to cylinder. The deformation and energy absorption performance of the structures were characterized by the cooperation of experimental and numerical methods. First, two types (small and large thickness ratios) of antitetrachiral honeycombs were manufactured by 3D printing. Then, the deformation mode, negative Poisson’s ratio (NPR) and crushing stress of the honeycombs were obtained experimentally. After that, a finite element (FE) model was established by using ABAQUS/Explicit, and the numerical model and method were validated. Based on experimental and numerical results, the X mode, double-parallel line mode and cylinder mode were obtained in the compressive deformation of the honeycomb with a small thickness ratio. The Bi-V mode, “≡\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\equiv $$\end{document}” mode and Z mode were obtained in the compressive deformation of the honeycomb with a large thickness ratio. The influence of the thickness ratio of ligament to cylinder was studied, and a thickness ratio of 1.625 was the critical value for the transformation of the antitetrachiral honeycomb deformation modes.
Acta Mechanica Solida Sinica – Springer Journals
Published: Jun 1, 2022
Keywords: Antitetrachiral honeycomb; Negative Poisson’s ratio; Thickness ratio; Deformation mode; Compression
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