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  • Gibson, A. G.University of Newcastle (author)

Mechanics of the squeeze flow of planar fibre suspensions

  • Article/chapterEnglish1999

Publisher, publication year, extent ...

  • 1999
  • printrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:kth-80047
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-80047URI
  • https://doi.org/10.1016/S0377-0257(98)00127-XDOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • References: Lee, L.J., Marker, L.F., Griffith, R.M., The rheology and mold flow of polyester sheet molding compound (1981) Polym. Composites, 2 (4), pp. 209-218; Barone, M.R., Caulk, D.A., Kinematics of flow in sheet molding compounds (1985) Polym. Composites, 6 (2), pp. 105-109; Barone, M.R., Caulk, D.A., A model for the flow of a chopped fiber reinforced polymer compound in compression molding (1986) J. Appl. Mech., 53, pp. 361-371; Scott, J.R., Theory and application of the parallel plate viscometer (1931) Trans. Inst. Rubber Ind., 7, pp. 169-186; Leider, P.J., Bird, R.B., Squeezing flow between parallel disks I. Theoretical analysis (1974) Ind. Eng. Chem. Fundam., 13, pp. 336-346; McClelland, M.A., Finlayson, B.A., Squeezing flow of highly viscous polymers (1988) J. Rheol., 32, pp. 101-133; McClelland, M.A., Finlayson, B.A., Squeezing flow of elastic liquids (1983) J. Non-Newtonian Fluid Mech., 13, pp. 181-201; Lee, S.J., Denn, M.M., Crochet, M.J., Metzner, A.B., Riggins, G.J., Compressive flow between parallel disks II. Oscillatory behaviour of viscoelastic materials under a constant load (1984) J. Non-Newtonian Fluid Mech., 14, pp. 301-325; Brindley, G., Davies, J.M., Walters, K., Elastico-viscous squeeze films. Part I (1976) J. Non-Newtonian Fluid Mech., 1, pp. 19-37; Winther, G., Almdal, K., Kramer, O., Determination of polymer melt viscosity by squeezing flow with constant plate velocity (1991) J. Non-Newtonian Fluid Mech., 39, pp. 119-137; Kotsikos, G., Bland, J.H., Gibson, A.G., Squeeze flow of glass mat thermoplastic materials Composites A, , submitted; Kotsikos, G., Bland, J.H., Gibson, A.G., Squeeze flow characterisation of glass mat thermoplastics (1996) 4th Conf. on Flow Processes in Composites, , FPCM-4, Aberystwyth, 9-11 September; Ericsson, A., (1996) Rheology of Glass Mat Thermoplastic, , Thesis No. 1472, LTC-EPFL, Lausanne; Ericsson, K.A., Toll, S., Manson, J.-A.E., The two-way interaction between anisotropic flow and fiber orientation in squeeze flow J. Rheol., , submitted; Ericsson, K.A., Toll, S., Manson, J.-A.E., Sliding plate rheometry of a concentrated fiber suspension J. Rheol., , submitted; Gibson, A.G., Die entry flow of reinforced polymers (1989) Composites, 20 (1), pp. 57-64; Binding, D.M., An approximate analysis for contraction and converging flows (1988) J. Non-Newtonian Fluid Mech., 27, pp. 173-189; Toll, S., Manson, J.-A.E., Dynamics of a planar concentrated fibre suspension with non-hydrodynamic interaction, The non-hydrodynamic stress system in a planar concentrated fiber suspension (1994) J. Rheol., 38 (4), pp. 985-997; Batchelor, G.K., The stress generated in a non-dilute suspension of elongated particles by pure straining motion (1971) J. Fluid Mech., 46 (3), pp. 813-829; Dinh, S.M., Armstrong, R.C., A rheological equation of state for semiconcentrated fibre suspensions (1984) J. Rheol., 28 (3), pp. 207-227; Goddard, J.D., Tensile stress contribution of flow-oriented slender particles in Non-Newtonian fluids (1976) J. Non-Newtonian Fluid Mech., 1, pp. 1-17; Shaqfeh, E.S.G., Fredrickson, G.H., The hydrodynamic stress in a suspension of rods (1990) Phys. Fluids A, 2 (1), pp. 7-24NR 20140805
  • This paper discusses the axisymmetric squeeze flow of concentrated transversely isotropic fibre suspensions in a power-law matrix and relates to the processing of composite materials such as sheet moulding compounds (SMCs) and glass mat thermoplastics (GMTs). A solution to the squeeze flow problem for a transversely isotropic power-law fluid is presented first, followed by a more detailed micromechanical analysis. In the first part of the paper a variational approach is applied to the interpretation of squeeze flow behaviour. This gives a simple expression for the total pressure, which enables the contributions due to extension and shear to be separated. Applying the procedure to GMT data suggests that the dissipation is predominantly extensional, except at very low plate separations. In the second part, a non-local constitutive equation is derived based on a simple drag law for hydrodynamic interactions. This is then used to model the pressure distribution when the effective length of the fibres is comparable to or determined by the dimensions of the squeeze flow plates. The model is shown to describe the observed squeeze flow stresses in both long and short fibre systems and to relate behaviour to the underlying resin flow properties. © 1999 Elsevier Science B.V. All rights reserved.

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  • Toll, StaffanChalmers(Swepub:kth)u1uia8lm (author)
  • University of NewcastleChalmers (creator_code:org_t)

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  • In:Journal of Non-Newtonian Fluid Mechanics82:1, s. 1-240377-0257

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Toll, Staffan
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