A Fast Permeability Measurement Method Based on Hybrid Fiber Preforms

[+] Author and Article Information
Chensong Dong

 Rakon Limited, One Pacific Rise, Mt. Wellington, Private Bag 99943, Newmarket, Auckland, New Zealandchensongdong@yahoo.com

J. Manuf. Sci. Eng 127(3), 670-676 (Aug 05, 2004) (7 pages) doi:10.1115/1.1954794 History: Received October 28, 2003; Revised August 05, 2004

In this paper, a permeability measurement method using hybrid fiber preforms is presented. The hybrid fiber preform can be composed of different fiber mat types, different numbers of fiber mats of the same type, or both. The computational procedure for permeability based on flow front location and flow time data was derived. This approach was validated by both simulation and experimental studies. The results show that by using this method, permeability values of different fiber mat types or the relationship between permeability and fiber volume fraction (porosity) can be obtained through a single experiment. This permeability measurement method based on hybrid fiber preforms yields compatible measurement accuracies while significantly improving the measurement efficiency. It provides a fast, accurate, and easy-to-use approach for permeability characterization, which is of great significance for the integrated composite product and process development.

Copyright © 2005 by American Society of Mechanical Engineers
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Figure 4

Configuration of hybrid fiber preforms

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Figure 5

Flow front from simulation

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Figure 9

Permeability computed from experimental result

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Figure 1

Integrated composite product development

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Figure 2

Channel flow apparatus for measuring preform permeability

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Figure 3

Experiment apparatus

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Figure 8

Flow front from experiment

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Figure 6

Permeability computed from simulation result




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