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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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
- Experimental Study
- Relaxation Time
- Shear Rate
- Normal Stress