Fiber orientation kinetics of a concentrated short glass fiber suspension in startup of simple shear flow

Eberle, Aaron P. R.; Vélez‐García, Gregorio M.; Baird, Donald G.; Wapperom, Peter

doi:10.1016/j.jnnfm.2009.10.003

Cited by 41 publications

(70 citation statements)

References 36 publications

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“…The gap between the stationary and moving plate of the SPR was kept at 1.50 mm and yields a gap to fiber diameter ratio of approximately 100 for all glass systems analyzed. This ratio is above the ratio used for short glass fiber samples, as proposed in the work of Sepehr et al (2004) and Eberle et al (2010). The effect of gap on LGF samples, however, has not yet been determined.…”

Section: Sliding Plate Rheometermentioning

confidence: 73%

“…(5), but this model in many cases over predicts the rate of fiber orientation and, in general, was found to describe the orientation of short fibers only qualitatively well, such as shown in the work of Bay (1991) and Eberle et al (2010). In a later paper, Eq.…”

Section: Predicting Long Fiber Orientationmentioning

confidence: 95%

“…(6), a is a number between 0 and 1 and reduces the rate of fiber orientation. Adding the slip coefficient to the Folgar-Tucker equation results in a loss of material objectivity, for example, see the work of Wang et al (2008), but the behavior of the model is still valid in the case of simple shear flow, as shown by Eberle et al (2010). Additionally, an anisotropic rotary diffusion (ARD) form of the Folgar-Tucker equation exists, but will not be discussed in this research, and instead the reader is referred to the work of Phelps and Tucker (2009).…”

Section: Predicting Long Fiber Orientationmentioning

confidence: 99%

See 2 more Smart Citations

Using startup of steady shear flow in a sliding plate rheometer to determine material parameters for the purpose of predicting long fiber orientation

Ortman¹,

Baird²,

Wapperom³

et al. 2012

Journal of Rheology

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SynopsisThe properties of long glass fiber reinforced parts, such as those manufactured by means of injection molding and compression molding, are highly dependent on the fiber orientation generated during processing. A sliding plate rheometer was used to understand the transient stress and orientation development of concentrated long glass fibers during the startup of steady shear flow. An orientation model and stress tensor combination, based on semiflexible fibers, was assessed in its ability to predict fiber orientation when using model parameters obtained from the fits of the stress responses. Specifically, samples of different initial fiber orientations was subjected to the startup of steady shear flow, and an orientation model based on bead and rod theory was coupled with a derived stress tensor that accounts for the semiflexibility of the fibers to obtain the corresponding model parameters. The results showed the semiflexible orientation model and stress tensor combination, overall, provided improved rheological results as compared to the Folgar-Tucker model when coupled with the stress tensor of Lipscomb et al. [J. Non-Newtonian Fluid Mech. 26, 297-325 (1988)]. Furthermore, it was found that both stress tensors required empirical modification to accurately fit the measured data. Finally, orientation models provided encouraging results when predicting the transient fiber orientation for all initial fiber orientations explored. V C 2012 The Society of Rheology. [http://dx

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Section: Sliding Plate Rheometermentioning

confidence: 73%

Section: Predicting Long Fiber Orientationmentioning

confidence: 95%

Section: Predicting Long Fiber Orientationmentioning

confidence: 99%

See 1 more Smart Citation

Using startup of steady shear flow in a sliding plate rheometer to determine material parameters for the purpose of predicting long fiber orientation

Ortman¹,

Baird²,

Wapperom³

et al. 2012

Journal of Rheology

Self Cite

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“…In both cases, a shear thinning region appears when the shear rate is raised because of the disruption of intermolecular interactions and finally a Newtonian region can be observed at high speed. hampered resulting in a decrease of viscosity [41]. Besides, imidazolium-based cations have a great attraction to carbon nanophases [14], and then the interaction between the cation and the anion is suppressed and the anion has a higher mobility [42].…”

Section: Resultsmentioning

confidence: 99%

Rheological behavior of multiwalled carbon nanotube-imidazolium tosylate ionic liquid dispersions

et al. 2017

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The rheological behavior of 1-ethyl-3-methylimidazolium tosylate (EMIMTsO) and its dispersions with aligned and non-aligned multi-walled carbon nanotubes (MWCNTs) has been studied. Raman spectroscopy analysis has been carried out to characterize the samples. The effects of concentration, type of CNTs and temperature on the viscolelastic behavior of EMIMTsO have been evaluated. Regardless the concentration and type of added CNTs, a non-Newtonian behavior of the fluids has been found under shear stress.The ionic liquid and the EMIMTsO-MWCNTs 1 wt% dispersion showed a temperatureinduced gelation. However, the addition of small concentrations of MWCNTs prevents from the formation of gels.

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“…Because of the validity for dilute fluids, Folgar & Tucker improved the model in consideration of filler content and aspect ratio of the filler [5]. Actual simulations are based on these findings and were extended with various factors considering the influence of fiber interactions and mold temperature [6,7].…”

Section: Simulation Of Fiber Orientationmentioning

confidence: 99%

Effects of fiber orientation on the electrical conductivity of filled plastic melt

Schneidmadel¹,

Koch²,

Bruchmüller³

2016

AIP Conference Proceedings

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Fiber orientation kinetics of a concentrated short glass fiber suspension in startup of simple shear flow

Cited by 41 publications

References 36 publications

Using startup of steady shear flow in a sliding plate rheometer to determine material parameters for the purpose of predicting long fiber orientation

Using startup of steady shear flow in a sliding plate rheometer to determine material parameters for the purpose of predicting long fiber orientation

Rheological behavior of multiwalled carbon nanotube-imidazolium tosylate ionic liquid dispersions

Effects of fiber orientation on the electrical conductivity of filled plastic melt

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