A Simple Continuum Model of Creep in a Fiber Composite Beam

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Abstract
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.

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