FE analysis of the in-plane mechanical properties of a novel Voronoi-type lattice with positive and negative Poisson's ratio configurations

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:49

Article

Bouakba, Mustapha^2,3  Bezazi, Abderrezak³  Scarpa, Fabrizio¹ 

[1] Univ Bristol, ACCIS, Bristol BS8 1TR, Avon, England

[2] Univ Kasdi Merbah Ouargla, Route De Ghardaia 30000, Algeria

[3] Univ 08 Mai 1945, LMS, Guelma 24000, Algeria

关键词: Lattice structures;    Elastic behaviour;    Simulation;    Finite element analysis;   

DOI  :  10.1016/j.ijsolstr.2012.05.007

来源: Elsevier

【 摘 要 】

This work presents a novel formulation for a Voronoi-type cellular material with in-plane anisotropic behaviour, showing global positive and negative Poisson's ratio effects under uniaxial tensile loading. The effects of the cell geometry and relative density over the global stiffness, equivalent in-plane Poisson's ratios and shear modulus of the Voronoi-type structure are evaluated with a parametric analysis. Empirical formulas are identified to reproduce the mechanical trends of the equivalent homogeneous orthotropic material representing the Voronoi-type structure and its geometry parameters. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free