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More on the elongational viscosity of an oriented fiber assemblyThe effective elongational viscosity for an oriented fiber assembly of discontinuous fibers suspended in a viscous matrix fluid is developed for a fiber array with variable overlap length of both symmetric and asymmetric geometries. Further, the relation is developed for a power-law matrix fluid with finite yield stress. The developed relations for a Newtonian fluid reveal that the influence of overlap length upon elongational viscosity may be expressed as a polynomial of second order. The results for symmetric and asymmetric geometries are shown to be equivalent. Finally, for the power-law fluid the influence of fiber aspect ratio on elongational viscosity was shown to be of order m + 1, where m is greater than 0 and less than 1, as compared to 2 for the Newtonian fluid, while the effective yield stress was found to be proportional to the fiber aspect ratio and volume fraction.
Document ID
19910042116
Document Type
Conference Paper
Authors
Pipes, R. Byron, Jr.
(Delaware Univ. Newark, DE, United States)
Beaussart, A. J.
(Delaware Univ. Newark, DE, United States)
Okine, R. K.
(Delaware, University Newark, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Structural Mechanics
Meeting Information
Meeting: Technical Conference of the American Society for Composites
Location: East Lansing, MI
Country: United States
Start Date: June 12, 1990
End Date: June 14, 1990
Accession Number
91A26739
Funding Number(s)
CONTRACT_GRANT: NAS1-18758
Distribution Limits
Public
Copyright
Other

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