Abstract
An acoustical method of predicting permeability of orthotropic fibers is presented. The acoustical method uses standardized impedance tube measurement as per ASTM E 1050. Absoprtion coefficient, Reflection coefficient and Impedance ratio are first measured using the impedance tube. Reverse calculation of these acoustical properties yield flow resistivity that is inverse of permeability. The method can measure, glass, carbon and hybrid lay ups of differing porosity values with ease. The impedance tube can be utilized to measure longitudinal and transverse permeability using the method described. Sized and unsized fibers are measured using this technique. Negligible variation in permeability is found due to the absence of sizing.
| Original language | English |
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| Title of host publication | 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites |
| Pages | 903-908 |
| Number of pages | 6 |
| Volume | 2 |
| Publication status | Published - Dec 1 2009 |
| Event | 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites - Newark, DE, United States Duration: Sep 15 2009 → Sep 17 2009 |
Other
| Other | 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites |
|---|---|
| Country | United States |
| City | Newark, DE |
| Period | 9/15/09 → 9/17/09 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
Cite this
Sharma, S., & Siginer, D. A. (2009). An acoustical method of predicting permeability of orthotropic fibers. In 24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites (Vol. 2, pp. 903-908)