Interactive Growth of Multiple Fiber-Bridged Matrix Cracks in Unidirectional Composites

[+] Author and Article Information
Y. Huang

Department of Mechanical Engineering—Engineering Mechanics, Michigan Technological University, Houghton, MI 49931

N.-Y. Li

Engineering Design Center, Alcoa Technical Center, Alcoa Center, PA 15069

H. W. Zhang

4 Louisburg Sq., Apt. 11, Nashua, NH 03060

K.-C. Hwang

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

J. Eng. Mater. Technol 118(3), 295-301 (Jul 01, 1996) (7 pages) doi:10.1115/1.2806809 History: Received August 13, 1994; Revised August 05, 1995; Online November 27, 2007


A model is developed for monotonic and cyclic fiber sliding in a fiber-reinforced composite containing multiple cracks. The model is used to study the fatigue growth of multiple cracks in a matrix reinforced with aligned, continuous fibers, where cracks are bridged by frictionally constrained fibers. It is established that the crack tip stress intensity factor is significantly reduced in multiple cracking due to interactions among cracks and among slip zones. The fatigue crack does not grow as fast as that for a single bridged crack or for multiple nonbridged cracks, thus the approach to steady-state crack growth is significantly delayed.

Copyright © 1996 by The American Society of Mechanical Engineers
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