A Simple Continuum Model of Creep in a Fiber Composite Beam

[+] Author and Article Information
J. T. Evans

Department of Mechanical, Materials and Manufacturing Engineering, University of Newcastle-upon-Tyne, Newcastle-upon-Tyne NE1 7RU, England

J. Appl. Mech 60(1), 190-194 (Mar 01, 1993) (5 pages) doi:10.1115/1.2900744 History: Received September 05, 1991; Revised February 26, 1992; Online March 31, 2008


A simple linear model of creep of a fiber composite beam treated as a continuum is presented. The model predicts that the displacement of a tip-loaded cantilever is linear with time but that the surface tensile stress increases approximately with the square root of time. The increase in tensile stress is in line with the prediction of stress channelling in the theory of ideal fiber-reinforced materials. The results are discussed in relation to some previous experimental observations and a generalization of the model which might be of value in life-time prediction is suggested.

Copyright © 1993 by The American Society of Mechanical Engineers
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