Permeability Tests of Carbon Fibre Preforms

Abstract:

• Periodical: Key Engineering Materials (Volumes 230-232)
• Pages: 331-334
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.230-232.331
• Online since: October 2002
• Authors: Silvestre T. Pinho, Célia Novo, António Nicolau, André Vieira, Nuno Correia, António Torres Marques
• Keywords: Carbon, Composite, Permeability, RTM

References

[1987] 2 Weitzenbock, J.R. et al, Radial flow permeability measurement. Part A: Theory, Composites: Part A 30 (1999) 781 –

[796] Part B: Application, Composites: Part B 30 (1999) 797 – 813. 3 Lundstrom, et al, “In plane permeability measurements: stability, repeatability and reproducibility”; ICCM 12, 1999. 4 Trochu, François, et al, Concurrent Methods for Permeability Measurement in Resin Transfer Molding, Polymer Composites, February 1996, Vol. 17, Nº. 1. † For instance, F. Trochu4 uses a different definition of permeability, which can be related to the one used in this document by the factor �. Results - Statistical analysis k1 k2 mean [m2 ] 3.96E-10 2.14E-10 D [m2 ] 1.02E-11 6.56E-12 D /mean 2.6% 3.1% (max-mean)/mean 2.4% 4.3% Tests 02 through 05 (mean-min)/mean 3.6% 2.4% mean [m2 ] 6.67E-11 3.11E-11 D [m2 ] 8.72E-12 3.90E-12 D /mean 13.1% 12.5% (max-mean)/mean 11.0% 11.9% Tests 07 through 10 (mean-min)/mean 15.3% 13.8% FDT chart for test 05 -20 0 20 40 60 80 100 0 5 10 15 20 25 30 35 40 45 50 t [s] FDT [s-1] FDT x FDT y Pe rmea bility for HT A G11 51 6 00 fabric 0 1E-10 2E-10 3E-10 4E-10 5E-10 6E-10

35 0.4 0.45 0.5 0.55 0.6 fibre vo lum e fra ction perm eability [m^2] k 1 k 2 Test 01 Test 06