ORIGIN OF HYSTERESIS OBSERVED DURING FATIGUE OF CERAMIC-MATRIX COMPOSITES

被引：89
|
作者：
KOTIL, T
HOLMES, JW
COMNINOU, M
机构：
[1] Ceramic Composites Research Laboratory, Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 07期
关键词：
composites; fatigue; hysteresis; shear; silicon nitride;
D O I：
10.1111/j.1151-2916.1990.tb05239.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Possible mechanisms for the hysteresis in stress‐strain response observed during fatigue of fiber‐reinforced ceramics are examined analytically. In the model developed, the microstructure of a unidirectional composite is divided into adjacent cells, each containing a single fiber. The compliance of each cell is modeled by a series of springs, with frictional sliding of fibers represented by sliding blocks. Fatigue damage is modeled by allowing fibers to debond and fracture on a random cycle‐by‐cycle basis. The magnitude of the interfacial shear between the fibers and matrix is shown to play a significant role in determining the extent of hysteresis observed during fatigue loading of unidirectional composites. Practical considerations, such as the influence of fiber volume fraction on macroscopic fatigue behavior, are also discussed. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码：1879 / 1883
页数：5
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