Calculation method and numerical verification of transverse dynamic permeability in large-tow carbon fiber tows
In view of the limitation that the existing theoretical methods cannot reflect the influence of fiber wettability on permeability,the analytical expression of capillary pressure and the calculation formula of lateral dynamic permeability of fiber tow impregnation process were derived.The numerical simulation of the process of resin impregnated fiber tows was carried out by using a phase field method.The simulation results indicated that the numerical solution of the capillary pressure obtained by the phase field method was consistent with the analytical solution obtained from this paper.This proved the reliability of the developed method.The effects of fiber volume fraction and contact angle on the dynamic per-meability were studied.The results indicated that this method could better characterize the effect of fiber wettability on the permeability and realize the dynamic prediction of the permeability at different impregnation radii.Compared to the existing permeability calculation methods,the developed method is more applicable and the calculation results are more accurate.
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维普
