AUXETIC FOAMS - MODELING NEGATIVE POISSONS RATIOS

被引：160

作者：

EVANS, KE ^{[1
]}

NKANSAH, MA ^{[1
]}

HUTCHINSON, IJ ^{[1
]}

机构：

[1] ICI CHEM & POLYMERS LTD, RES & TECHNOL GRP, RUNCORN WA7 4QE, CHESHIRE, ENGLAND

来源：

ACTA METALLURGICA ET MATERIALIA | 1994年 / 42卷 / 04期

关键词：

D O I：

10.1016/0956-7151(94)90145-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A finite element model for three-dimensional, open-celled foams is developed. A reentrant cell shape is defined that has the unusual property of exhibiting a negative Poisson's ratio. By altering the cell shape it is possible to achieve different values for the elastic constants and different degrees of anisotropy. It is shown that simple two-dimensional approximations fail to model the properties of the three-dimensional network accurately and a full three-dimensional analysis is required. The reentrant cell used is fully auxetic, with negative Poisson's ratios exhibited when loaded in all three orthogonal directions.

引用

页码：1289 / 1294

页数：6

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