In situ three-dimensional X-ray microtomography of an auxetic foam under tension

被引：57

作者：

McDonald, S. A. ^{[1
]}

Ravirala, N. ^{[2
]}

Withers, P. J. ^{[1
]}

Alderson, A. ^{[2
]}

机构：

[1] Univ Manchester, Sch Mat, Ctr Mat Sci, Manchester M1 7HS, Lancs, England

[2] Univ Bolton, Ctr Mat Res & Innovat, Bolton BL3 5AB, England

来源：

SCRIPTA MATERIALIA | 2009年 / 60卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

Auxetic foams; Microstructure; Mechanical properties; X-ray microtomography; Digital image correlation; DEFORMATION;

D O I：

10.1016/j.scriptamat.2008.10.013

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

X-ray microtomography has the potential to unambiguously identify the predominant deformation mechanisms responsible for the auxetic response of polymeric foams. It has been performed in situ oil an auxetic polyurethane foam Subjected to incremental uniaxial tensile loading. A Poisson's ratio of -0.20 measured from localized microstructural changes observed during the tomographic sequence compares well with the bulk value of -0.21 obtained by videoextensometry. Evidence obtained by digital image correlation for straightening of bent ribs and rotation of junctions Connecting ribs during straining is presented. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：232 / 235

页数：4

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