Journal ArticleDOI
Resistance to uniaxial extensional flow of fibre suspensions
Yong Wee Ooi,Tamarapu Sridhar +1 more
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In this paper, the tensile stress due to resistance to uniaxial extensional flow of fibre suspensions in Newtonian and non-Newtonian fluids has been measured using the filament stretching technique.Abstract:
The tensile stress due to resistance to uniaxial extensional flow of fibre suspensions in Newtonian and non-Newtonian fluids has been measured using the filament stretching technique. It has been found that addition of fibres to a Newtonian fluid increases the extensional viscosity. The steady state results agree with Bachelor’s theory and the stress growth behaviour is qualitatively predicted by the theory of Dinh and Armstrong. Experimental results from this work have also shown that the behaviour of a fibre suspension in viscoelastic fluid is qualitatively described by Fan’s equation. The added fibres increase the extensional stress growth coefficient of the viscoelastic fluid at low strain but have marginal effect on the fluid after the onset of strain-hardening.read more
Citations
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Journal ArticleDOI
Rheology of non-Brownian suspensions.
Morton M. Denn,Jeffrey F. Morris +1 more
TL;DR: The observed rheological behavior is reviewed, emphasizing concentrated suspensions of spheres in Newtonian fluids, and both particle-level and continuum approaches to describing the nonlinear behavior are examined.
Journal ArticleDOI
Rheology of pulp fibre suspensions: A critical review
TL;DR: In this paper, a review of past studies on the measurement of rheological properties of pulp fibre suspensions is presented, focusing on key properties of fibre suspensions, such as regimes of behaviour based on inter-fibre contact, apparent yield stress, apparent viscosity, and viscoelasticity.
Journal ArticleDOI
Deformation and orientation during shear and elongation of a polycarbonate/carbon nanotubes composite in the melt
Ulrich A. Handge,Petra Pötschke +1 more
TL;DR: In this article, the authors focused on the elongational rheology and the morphology of an electrically conductive polycarbonate/multiwalled carbon nanotubes (2 wt%) composite in the melt.
Journal ArticleDOI
Strain hardening behavior of polymer blends with fibril morphology
TL;DR: In this paper, the effect of fibril morphology on the extensional properties under uniaxial extension was investigated, and a small amount of the dispersed phase was added to the matrix and control the blend morphology by changing the viscosity ratio.
Journal ArticleDOI
Investigation of the rheological properties of short glass fiber-filled polypropylene in extensional flow
Julien Férec,Julien Férec,Marie-Claude Heuzey,José Pérez-González,Lourdes de Vargas,Gilles Ausias,Pierre J. Carreau +6 more
TL;DR: In this article, the behavior of short glass fiber-polypropylene suspensions in extensional flow was investigated using three different commercial instruments: the SER wind-up drums geometry (Extensional Rheology System) with a strain-controlled rotational rheometer, a Meissner-type Rheometer (RME), and the Rheotens.
References
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Journal ArticleDOI
Slender-body theory for particles of arbitrary cross-section in Stokes flow
TL;DR: In this article, the Stokeslet strength density of a rigid body is estimated to be independent of the body shape and is of order μUe, where U is a measure of the undisturbed velocity and e = (log 2l/R0)−1.
Journal ArticleDOI
The stress generated in a non-dilute suspension of elongated particles by pure straining motion
TL;DR: In this article, the authors investigated the effect of interactions between rigid particles in a dilute suspension and showed that the contribution of particles to the bulk stress due to the interactions between them is relatively large, for volume fractions which are still small.
Journal ArticleDOI
Rheology of Suspensions in Polymeric Liquids
TL;DR: In this article, the flow behavior of concentrated suspensions is reviewed for the processing of composites and similar polymeric materials, and the state of the art is a good one: a small number of experiments on a new formulation frequently suffice for a general prediction of flow behavior when solids are suspended in viscous molten polymers and in many instances, even a priori predictions of the viscosity are possible.
Journal ArticleDOI
A Rheological Equation of State for Semiconcentrated Fiber Suspensions
TL;DR: In this article, a rheological equation of state was developed for a semiconcentrated suspension of stiff fibers in a Newtonian solvent with volume fraction φ in the range (D/L)2<φ<(L/L), where L/D is the length-to-diameter ratio of the fibers.
Journal ArticleDOI
On the coefficient of viscous traction and its relation to that of viscosity
TL;DR: In this paper, it was shown that the rate of turning under torsion of a twisting rod is not of the same value everywhere, but necessarily varies from nothing at the centre to a maximum at the surface of the rod.
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