Young's modulus of unidirectional discontinuous-fibre composites

被引：66
|
作者：
Hsueh, CH [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA
来源：
COMPOSITES SCIENCE AND TECHNOLOGY | 2000年 / 60卷 / 14期
关键词：
short-fibre composites; modelling; stress transfer; elastic properties;
D O I：
10.1016/S0266-3538(00)00128-7
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
Young's modulus of a unidirectional discontinuous-fibre composite is derived in the present study by the use of a modified shear-lag model. To achieve this, correct determination of the stress transfer at the fibre ends and selection of the representative volume element in the analytical model are required. The present predicted stress distribution along the fibre length during uniaxial loading of the composite is in excellent agreement with that obtained from a finite-element analysis. Also, by a judicious choice of the representative volume element for the modified shear-lag model, the predicted Young's modulus of the composite is in excellent agreement with those predicted from the Halpin-Tsai semi-empirical equation, the Eshelby model, and numerical analyses. Comparison is also made with experimental measurements of Young's moduli of aligned particulate- or whisker-reinforced SiC/aluminum-alloy composites, and good agreement is obtained. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：2671 / 2680
页数：10
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