Analysis of Neck Propagation in Polymeric Fibres Including the Effects of Viscoplasticity

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  • P. Tug¯cu
    Universite´ de Sherbrooke, Sherbrooke, Que´bec, Canada, J1K 2R1
  • K. W. Neale
    Universite´ de Sherbrooke, Sherbrooke, Que´bec, Canada, J1K 2R1

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<jats:p>The effects of material strain-rate dependence on necking and neck propagation in polymeric fibres are analyzed. Using a finite element scheme together with an elastic-viscoplastic constitutive model the entire load-deformation histories of round specimens are computed. Stress-strain distributions as well as the evolution of the specimen profiles are given at various stages of the axisymmetric stretching process. Comparisons with rate-independent response are also presented.</jats:p>

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