Mechanics of thin ultra-light stainless steel sandwich sheet material Part I. Stiffness

被引:55
作者
Markaki, AE [1 ]
Clyne, TW [1 ]
机构
[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
关键词
stainless steel; lightweight materials; sandwich panels; steel fibres; composite materials; single fibre testing; elastic constants; beam stiffness;
D O I
10.1016/S1359-6454(02)00528-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Three variants of a novel steel sandwich sheet material have been studied. The geometrical arrangements of the steel fibres in the core have been characterised. Certain mechanical properties of the fibres have also been investigated. The beam stiffnesses of the sheets, and also their through-thickness Young's moduli, have been measured. These results have been compared with model predictions. It is shown that the beam stiffnesses are in all cases significantly lower than expected from simple bending theory. This is attributed to the low through-thickness stiffness of the core and also to a low resistance to shear. Modelling of these properties has facilitated the identification of changes to the core structure, which should lead to improved beam stiffness, while retaining a low density. Increased fibre diameter, and possibly an alteration to the fibre sectional shape, are the most promising changes. Of course, implications for other properties, and for ease of manufacture, will also need to be borne in mind. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1341 / 1350
页数:10
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