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.
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)
August 14, 2013
January 1, 1990
Meeting: Technical Conference of the American Society for Composites