RESEARCH ON PERMEABILITY PREDICTING FORMULA OF NON-CRIMPED FABRICS WITH FIBERS OF ELLIPSE EDGE

Abstract

Abstract: The results of CFD (Computational Fluid Dynamics) were applied to fit the ellipse edge formula for predicting permeability of NCF while the edge of fibers was approximated as semi-ellipse. Orthogonal tests of 5 factors and 5 levels were carried out on the NCF unit cell. The average error between numerical and the ellipse edge formula's results is 1.91% for quadratic arrangement and 1.90% for hexagonal arrangement. The error between experimental and the ellipse edge formula's result is 0.22%, which is smaller than the error of 3.96% between experimental and the rectangle edge formula's result. The ratio between the result of ellipse edge formula and rectangle edge formula is over 1.1, when the ratio between the width W₁ between fiber bundles and the major semi-axis c₁ of ellipse edge is less than 0.8. The results verified that the ellipse edge formula was more accurate and the application was broader.

Key words: RTM, non-crimped fabrics, permeability, predicting formula

CLC Number:

TB332

KANG Ning, LIANG Xuan-yong. RESEARCH ON PERMEABILITY PREDICTING FORMULA OF NON-CRIMPED FABRICS WITH FIBERS OF ELLIPSE EDGE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(1): 30-35.

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