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Modelling finite deformation stress-strain response during loading-unloading of polyethylene over a wide range of crystallinities

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2010
auteur(s) Ayoub Georges; Zaïri Fahmi; Fréderix Caroline; Gloaguen Jean-Michel; Naït Abdelaziz Moussa; Seguela Roland; Lefebvre Jean-Marc
journal (abréviation) Procedia Engineering (Procedia Eng)
volume (numéro) 2 (1)
  
pages 977 – 98
résumé Experimental observations are reported on the finite deformation stress-strain response during loading-unloading of polyethylene materials covering the range of crystal volume fractions 0.15–0.72. Hyperelastic-viscoplastic constitutive equations, based on a two-phase interpretation of the microstructure, are derived. It is shown that the constitutive model adequately describes the experimental observations under loading-unloading conditions.
mots clés Semicrystalline polymers; Crystallinity effects; Loading-unloading behaviour; Hyperelastic-viscoplastic model
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