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Abstract

For various commercial woven glass fiber fabrics, the orientation of the permeability principal axes has been experimentally determined as function of the fiber angle, carrying out two-dimensional flow experiments with radial liquid injection. The investigated fabrics have in general been found to significantly show anisotropic properties even for the unsheared material. The orientation of the permeability principal axes of sheared fabrics is related to the degree of anisotropy, characterized by the ratio of the permeability principal values for the unsheared fabrics. The orientation of the permeability principal axes as a function of the fiber angle is described by an empirical formula, with the ratio of the permeability principal values of the unsheared fabric as parameter. Comparison of experimental and theoretical results in general indicates correspondence. Exceptions can be explained by uncertainties in the experimentally determined permeability principal values of the unsheared fabric.

Keywords

liquid composites moulding permeability anisotropy flow front principal directions

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References

1. Adams, K.L. and Rebenfeld, L. (1987). In-Plane Flow of Fluids in Fabrics: Structure/Flow Characterization , Textile Research Journal, 57: 647-654 .

2. Adams, K.L. , Russel, W.B. and Rebenfeld, L. (1988). Radial Penetration of a Viscous Liquid into a Planar Anisotropic Porous Medium , International Journal of Multiphase Flow, 14(2): 203-215 .

3. Chan, A.W. and Hwang, S.T. (1991). Anisotropic In-Plane Permeability of Fabric Media , Polymer Engineering and Science, 31(6): 1233-1239 .

4. Parnas, R.S. and Salem, A.J. (1993). A Comparison of the Unidirectional and Radial In-Plane Flow of Fluids Through Woven Composite Reinforcements , Polymer Composites, 14(5): 383-394 .

5. Chan, A.W. , Larive, D.E. and Morgan, R.J. (1993). Anisotropic Permeability of Fiber Preforms: Constant Flow Rate Measurement , Journal of Composite Materials, 27(10): 996-1008 .

6. Young, W.B. and Wu, S.F. (1995). Permeability Measurement of Bidirectional Woven Glass Fibers , Journal of Reinforced Plastics and Composites, 14: 1108-1120 .

7. Gebart, B.R. and Lidstrom, P. (1996). Measurement of In-Plane Permeability of Anisotropic Fiber Reinforcements , Polymer Composites, 17(1): 43-51 .

8. Han, K.K. , Lee, C.W. and Rice, B.P. (2000). Measurements of the Permeability of Fiber Preforms and Applications , Composites Science and Technology, 60: 2435-2441 .

9. Hammami, A. , Trochu, F. , Gauvin, R. and Wirth, S. (1996). Directional Permeability Measurement of Deformed Reinforcement , Journal of Reinforced Plastics and Composites, 15: 552-562 .

10.

10. Simacek, P. and Advani, S.G. (1996). Permeability Model for a Woven Fabric , Polymer Composites, 17(6): 887-899 .

11.

11. Smith, P. , Rudd, C.D. and Long, A.C. (1997). The Effect of Shear Deformation on the Processing and Mechanical Properties of Aligned Reinforcements , Composites Science and Technology, 57: 327-344 .

12.

12. Lai, C.L. and Young, W.B. (1997). Model Resin Permeation of Fiber Reinforcements After Shear Deformation , Polymer Composites, 18(5): 642-648 .

13.

13. Slade, J. , Sozer, E.M. and Advani, S.G. (2000). Fluid Impregnation of Deformed Preforms , Journal of Reinforced Plastics and Composites, 19(7): 552-568 .

14.

14. Heardman, E. , Lekakou, C. and Bader, M.G. (2001). In-plane Permeability of Sheared Fabrics , Composites Part A, 32: 933-940 .

15.

15. Lai, C.L. and Young, W.B. (1999). The Effects of Preforming Induced Variable Permeabilities on the RTM Molding Flow , Polymer Composites, 20(2): 225-239 .

16.

16. Parnas, R.S. and Phelan, F.R.JR. (1991). The Effect of Heterogeneous Porous Media on Mold Filling in Resin Transfer Molding , SAMPE Quarterly, 22(2): 53-60 .

17.

17. Parnas, R.S. , Salem, A.J. , Sadiq, T.A.K. , Wang, H.P. and Advani, S.G. (1994). The Interaction Between Micro- and Macroscopic Flow in RTM Preforms , Composite Structures, 27: 93-107 .

18.

18. Pillai, K.M. and Advani, S.G. (1995). Numerical and Analytical Study to Estimate the Effect of Two Length Scales upon the Permeability of a Fibrous Porous Medium , Transport in Porous Media, 21: 1-17 .

Orientation of the Permeability Principal Axes in Bi-Directional Textile Fabrics

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