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Article Dans Une Revue International Journal of Material Forming Année : 2014

Stretch blow moulding of PET; structure development and constitutive model

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Noëlle Billon
Martin Picard
Eric Gorlier
  • Fonction : Auteur

Résumé

Microstructure of PET in stretch blow moulding is studied combining controlled tension followed by quenching, free-blow and ISBM. Due to quenching, observed final microstructure is often closer to a mesophase than to crystal. Texture is, for its part, controlled by the loading path. In fact stretching only induces appearance of an oriented precursor-phase that will become a crystal during cooling steps providing that this latter is slow enough. Microstructure evolution does not obey the classical "nucleation -growth" schematic. This enlightens development of constitutive models demonstrating the irrelevance of the crystallinity ratio as parameter and of the Avrami-like approach as part of the model. One, model based on revisited network approach is suggested.
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Dates et versions

hal-00820970 , version 1 (07-05-2013)

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Noëlle Billon, Martin Picard, Eric Gorlier. Stretch blow moulding of PET; structure development and constitutive model. International Journal of Material Forming, 2014, 7 (3), pp.369-378. ⟨10.1007/s12289-013-1131-1⟩. ⟨hal-00820970⟩
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