Stress Concentrations in a Hybrid Composite Sheet

[+] Author and Article Information
H. Fukuda

Institute of Interdisciplinary Research, University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153, Japan

T. W. Chou

Mechanical and Aerospace Engineering Department, University of Delaware, Newark, Del. 19711

J. Appl. Mech 50(4a), 845-848 (Dec 01, 1983) (4 pages) doi:10.1115/1.3167155 History: Received September 01, 1981; Revised February 01, 1983; Online July 21, 2009


This paper examines the load redistribution in a hybrid composite sheet due to fiber breakage. The hybrid composite contains both high modulus and low modulus fibers arranged in alternating positions. Stress concentration factors for both types of fibers immediately adjacent to a group of fractured fibers have been evaluated. The method of influence function and Fourier series representation are adopted. Results of stress concentration factors are presented in terms of the number of fractured fibers and their geometric arrangements. Reduction of the stress concentration factor of the high modulus fibers when dispersed among the low modulus fibers provides a theoretical explanation of the observed “hybrid effect.” The present analysis can be readily incorporated into a failure model taking into account the statistical nature of fiber strength.

Copyright © 1983 by ASME
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