HOLOGRAPHIC STUDY OF CONVENTIONAL AND NEGATIVE POISSON RATIO METALLIC FOAMS - ELASTICITY, YIELD AND MICRO-DEFORMATION

被引：38
|
作者：
CHEN, CP
LAKES, RS
机构：
[1] UNIV IOWA,DEPT BIOMED ENGN,IOWA CITY,IA 52242
[2] UNIV IOWA,CTR LASER SCI & ENGN,IOWA CITY,IA 52242
来源：
JOURNAL OF MATERIALS SCIENCE | 1991年 / 26卷 / 20期
关键词：
D O I：
10.1007/BF02403936
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An experimental study by holographic interferometry is reported of the following material properties of conventional and negative Poisson's ratio copper foams: Young's moduli, Poisson's ratios, yield strengths and characteristic lengths associated with inhomogeneous deformation. The Young's modulus and yield strength of the conventional copper foam were comparable to those predicted by microstructural modelling on the basis of cellular rib bending. The re-entrant copper foam exhibited a negative Poisson's ratio, as indicated by the elliptical contour fringes on the specimen surface in the bending tests. Inhomogeneous, non-affine deformation was observed holographically in both foam materials.
引用
收藏
页码：5397 / 5402
页数：6
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