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Fiber-fiber interaction in concentrated suspensions: Disperse fibers
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Lightweight Structures.
1999 (English)In: Journal of Rheology, ISSN 01486055 (ISSN), Vol. 43, no 4, 991-1004 p.Article in journal (Refereed) Published
Abstract [en]

A hypothesis for fiber-fiber interaction in planar randomly oriented concentrated fiber suspensions is proposed and tested. The idea is that at sufficiently high fiber concentrations, friction and lubrication at fiber-fiber contact points are the dominant interaction mechanisms. A fiber pull-out technique is introduced to measure the force per unit fiber length on a single longitudinally moving fiber embedded in a volume of bulk suspension. By varying both the fiber velocity and the fiber volume fraction, the lubrication and frictional components of the force are identified. Furthermore, the corresponding bulk shear viscosity resulting from the same mechanisms is derived and compared with experimental data. The results support the hypothesis. © 1999 The Society of Rheology.

Place, publisher, year, edition, pages
1999. Vol. 43, no 4, 991-1004 p.
National Category
Applied Mechanics
URN: urn:nbn:se:kth:diva-80046OAI: diva2:495998

References: Adams, M.J., McKeown, R., Whall, A., A micromechanical model for the confined uniaxial compression of an assembly of elastically deforming spherical particles (1997) J. Phys. D, 30, pp. 912-920; Batchelor, G.K., The stress system in a suspension of force-free particles (1970) J. Fluid Mech., 41, pp. 545-570; Batchelor, G.K., The stress generated in a non-dilute suspension of elongated particles by pure straining motion (1971) J. Fluid Mech., 46, pp. 813-829; Bhushan, B., Gupta, B.K., (1991) Handbook of Tribology, , McGraw-Hill, New York; Cox, R.G., Brenner, H., The rheology of a suspension of particles in a Newtonian fluid (1971) Chem. Eng. Sci., 26, pp. 63-95

NR 20140805Available from: 2012-02-09 Created: 2012-02-09 Last updated: 2014-04-08Bibliographically approved

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