BOND STRENGTH MEASUREMENT IN COMPOSITES - ANALYSIS OF EXPERIMENTAL-TECHNIQUES

被引：59

作者：

HERRERAFRANCO, PJ

RAO, V

DRZAL, LT

CHIANG, MYM

机构：

[1] Michigan State University, Composite Materials and Structures Center, B100 Engineering Research Complex, East Lansing

[2] National Institute of Standards and Technology, Polymer Composites Group, Gaithersburg, MD 20899, Building 224

来源：

COMPOSITES ENGINEERING | 1992年 / 2卷 / 01期

关键词：

Plastics; Reinforced;

D O I：

10.1016/0961-9526(92)90016-Y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two of the most common techniques used to measure fiber-matrix interfacial shear strength, the single-fiber fragmentation test and the microbond, have been analyzed and compared. Photoelastic and finite element analyses were performed to obtain the stress distribution at the fiber-matrix interface and its dependence on the loading and geometrical parameters. The effect of a penny-shaped crack in the fiber, in the fiber fragmentation test is shown to be one of the parameters governing the interfacial failure mode. It is also shown that loading conditions, meniscus formation, and fiber free length have a large effect on the distribution of interfacial stresses in the case of the microbond, which may explain the large observed scatter of experimental results. Furthermore, it is shown that the effect of the stress distribution is highly non-uniform, thus making the calculation of shear stress very inaccurate when single averages are considered. It appears that the single-fiber fragmentation test is more reliable than the microbond test because of its simplicity and the smaller number of parameters involved in its analysis.

引用

页码：31 / 45

页数：15

共 15 条

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