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Experimental study of simple shear flow of monodisperse fibrous composites

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Abstract

Steady-state simple shear flow of epoxide resin and its composites containing 1, 3, or 5 vol. % fiber material was studied at temperatures ranging from 20 to 70°C. Normal stresses were measured. The decrease in viscosity with increasing shear rate, during the formation of a continuous fiber mesh, is interpreted according to the molecular-kinetic theory of flow of continuous media, on the assumption of viscoelastic flow elements with the relaxation time a function of the shear rate. The conditions are established for a transition from the slip mechanism of flow, which involves fiber linkages, to the cluster mechanism of flow.

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Additional information

Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 2, pp. 326–334, March–April, 1975.

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Faitel'son, L.A., Kovtun, V.P. Experimental study of simple shear flow of monodisperse fibrous composites. Polymer Mechanics 11, 276–282 (1975). https://doi.org/10.1007/BF00854735

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Keywords

  • Viscosity
  • Experimental Study
  • Relaxation Time
  • Shear Rate
  • Normal Stress