An acoustical method of predicting permeability of orthotropic fibers

S. Sharma, D. A. Siginer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publication24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites
Pages903-908
Number of pages6
Volume2
Publication statusPublished - Dec 1 2009
Event24th 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 2009Sep 17 2009

Other

Other24th Annual Technical Conference of the American Society for Composites 2009 and 1st Joint Canadian-American Technical Conference on Composites
CountryUnited States
CityNewark, DE
Period9/15/099/17/09

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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  • 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)