Viscosity of curved fibers in suspension

Joung, C.G.; Phan‐Thien, N.; Xie, Fan

doi:10.1016/s0377-0257(01)00163-x

Cited by 43 publications

(30 citation statements)

References 26 publications

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“…This may be due to the fibre bending in shear flow. Blakeney (1966) and Joung et al (2002) show experimentally and theoretically that the shear viscosity of a fibre suspension increases when the fibres become curved. A cylindrical fibre is expected to buckle in the flow gradient plane when the dimensionless group bending ratio (BR) is less than 1 (Forgacs and Mason 1959a).…”

Section: Shear-thinning Properties Of Carbon Fibre Suspensionsmentioning

confidence: 99%

The shear viscosity of carbon fibre suspension and its application for fibre length measurement

2015

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. (2016) The shear viscosity of carbon fibre suspension and its application for fibre length measurement. Rheologica Acta, 55 (1). pp. A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractThe viscosity of short carbon fibre suspensions in glycerol aqueous solution was measured using a bespoke vane-in-cup viscometer, where the carbon fibre has an aspect ratio from 450 to 2209. In the semi-concentrated regime, nL 3 ranging from 20 to 4400, the suspensions demonstrated strong shear-thinning characteristics particularly at higher concentrations. The shear-thinning characteristic is strongly related to the crowding factor proposed by Kerekes, indicating that non-hydrodynamic interactions occur in the suspensions. The influence of fibre bending on viscosity emerges when the bending ratio is lower than 0.0028. An empirical model based on transient network formation and rupture was proposed and used to correlate the relative viscosity with fibre concentration nL 3 and shear rate. Based on the model, a viscosity method is established to analyse the fibre length by measuring the viscosity of the fibre suspension using a bespoke vane-in-cup viscometer.

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Section: Shear-thinning Properties Of Carbon Fibre Suspensionsmentioning

confidence: 99%

The shear viscosity of carbon fibre suspension and its application for fibre length measurement

2015

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“…A recent study on this relationship was conducted by Joung et al (2002). They numerically studied the effect of curvature and suggested that small deformities in the fiber generated a large increase in the suspension viscosity.…”

Section: Suspension Viscositymentioning

confidence: 99%

“…Fiber deformation has a significant effect on fiber suspension viscosity (Joung et al, 2002). Blakeney (1966) found that a suspension of slightly curved fibers could increase the apparent suspension viscosity by 10-15% above that of a relative straight fiber suspension.…”

Section: Mechanism 4: Nylon Fiber Shape Deformationmentioning

confidence: 99%

“…From the results of Joung et al (2002), the time variation of gas holdup in Nylon fiber suspensions is influenced by the change in Nylon fiber deformation during an experiment, leading to a change in suspension viscosity. According to Lavrenko et al (1994), fiber degradation affects fiber properties like elastic modulus, which, in turn, affects fiber deformation.…”

Section: Mechanism 4: Nylon Fiber Shape Deformationmentioning

confidence: 99%

“…Fiber concentration (NfL 3 ) (Sundararaj akumar and Koch, 1997), fiber stiffness (especially for large aspect ratio fibers) (Schmid et al, 2000), fiber shape (Joung et al, 2002), and fiber orientation (Petrich et al, 2000) also affect fiber suspension viscosity.…”

Section: Influential Factors On Gas Holdup In Fiber Suspensionsmentioning

confidence: 99%

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Gas holdup in a gas-liquid-fiber semi-batch bubble column

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Sheet Molding Compounds

Orgéas,

Dumont

2012

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Sheet molding compounds (SMC) are fiber‐reinforced thermosetting semifinished products. They are produced in thin uncured and thickened sheets that can be handled easily before their forming process. To a larger extent, SMC is a generic term that designates such types of compounds together with the process to convert them into large composite parts, which mainly display shell‐like geometry. This process is usually compression molding. SMC are widely used in a large diversity of fields of applications (aerospace, agricultural, rail and marine, electrical and energy, domestic appliance, building and construction, and medical sectors), but the automotive and truck industries remain the drivers of SMC technology. After a short introduction, this article gives successively detailed descriptions of (i) the materials used in SMC, (ii) their compounding, (iii) the compression molding process, (iv) the final properties of SMC, and (v) SMC recycling.

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Viscosity of curved fibers in suspension

Cited by 43 publications

References 26 publications

The shear viscosity of carbon fibre suspension and its application for fibre length measurement

The shear viscosity of carbon fibre suspension and its application for fibre length measurement

Gas holdup in a gas-liquid-fiber semi-batch bubble column

Sheet Molding Compounds

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