Abstract
A single fibre composite model reinforced with a permeable fibre is used to evaluate the moisture diffusion coefficient analytically. Due to the fibre permeability, absorption of moisture takes place through both the fibre and the matrix. The diffusion paths around the fibre, due to their curved nature, are generated using the cubic spline theory. The diffusion paths through the permeable fibre are assumed to be a set of parallel lines. Diffusivities of such single fibre composites are computed at different values of relative fibre diffusivities. The relative fibre diffusivities corresponding to kevlar and jute fibres are considered separately to evaluate composite diffusivities. The diffusivities obtained for kevlar-epoxy and jute-epoxy single fibre models are found to be in good agreement with those available in the existing literature.
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