Transverse elastic shear of auxetic multi re-entrant honeycombs

被引：96

作者：

Lira, C. ^{[1
]}

Innocenti, P. ^{[1
]}

Scarpa, F. ^{[1
]}

机构：

[1] Univ Bristol, Dept Aerosp Engn, Bristol BS8 1TR, Avon, England

来源：

COMPOSITE STRUCTURES | 2009年 / 90卷 / 03期

关键词：

Auxetic; Honeycomb; Transverse shear; NEGATIVE POISSONS RATIO; STIFFNESS; DESIGN; CORES;

D O I：

10.1016/j.compstruct.2009.03.009

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The paper describes the transverse shear properties of a novel centresymmetric honeycomb structure evaluated using analytical and finite element models. The cellular structure features a representative volume element (RVE) geometry allowing in-plane auxetic (negative Poisson's ratio) deformations, and multiple topologies to design the honeycomb for multifunctional applications. The out-of-plane properties are calculated using a theoretical approach based on Voigt and Reuss bounds. The analytical models are validated using a full scale Finite Element technique to simulate transverse shear tests, a quarter FE of the RVE with periodic shear conditions and an FE homogenisation method for periodic structures. The comparison between the analytical and numerical models shows good convergence between the different set of results, and highlights the specific deformation mechanism of the multi re-entrant honeycomb cell. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：314 / 322

页数：9

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