Model of piezoresistivity in carbon fiber cement

被引：68

作者：

Wen, Sihai ^{[1
]}

Chung, D. D. L. ^{[1
]}

机构：

[1] SUNY Buffalo, Univ Buffalo, Composite Mat Res Lab, Buffalo, NY 14260 USA

来源：

CEMENT AND CONCRETE RESEARCH | 2006年 / 36卷 / 10期

基金：

美国国家科学基金会;

关键词：

electrical properties; cement paste; strain effect; microcracking; piezoresistivity;

D O I：

10.1016/j.cemconres.2006.03.029

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Piezoresistivity in carbon fiber cement allows strain sensing. It was first reported in 1993, but this paper provides the first theoretical model for this phenomenon. The model is based on the concept that the piezoresistivity is due to the slight pull-out of crack-bridging fibers during crack opening and the consequent increase in the contact electrical resistivity of the fiber-matrix interface. Good agreement is found between theory and experimental results obtained under tension/compression. (C) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1879 / 1885

页数：7

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