Non linear strain rate dependency and unloading behavior of semi-crystalline polymers

K. Hizoum, Y. Rémond, N. Bahlouli, V. Oshmyan, S. Patlazhan, Said Ahzi

Research output: Contribution to journalArticle

13 Citations (Scopus)


The classical viscoelastic constitutive equations do not simulate correctly the mechanical behavior of semi crystalline polymers, particularly in the case of the strain rate jumping or unloading to zero stress after tensile testing. The main experimental observations of mechanical response of polyethylene and polypropylene at small strains are reviewed. A physical model, which account for the deformation-induced evolution of the material structure, is developed and compared to the experimental observations. It is concluded that this model is the most adequate approach for the simulation of the mechanical behavior and the structure development of semi-crystalline polymers under loading and unloading.

Original languageEnglish
Pages (from-to)743-749
Number of pages7
JournalOil and Gas Science and Technology
Issue number6
Publication statusPublished - Nov 2006
Externally publishedYes


ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology

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