Forming Limit Curves in Blow Molding for a Polymer Exhibiting Deformation Induced Crystallization | Zendy

Arnaud Poitou | Zendy; Amine Ammar | Zendy; Germaine Nefussi | Zendy

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Forming Limit Curves in Blow Molding for a Polymer Exhibiting Deformation Induced Crystallization

Author(s) -

Arnaud Poitou,

Amine Ammar,

Germaine Nefussi

Publication year - 2002

Publication title -

international journal of forming processes

Language(s) - English

Resource type - Journals

eISSN - 2437-2366

pISSN - 1292-7775

DOI - 10.3166/ijfp.5.413-421

Subject(s) - necking , crystallization , materials science , composite material , deformation (meteorology) , molding (decorative) , polymer , hardening (computing) , strain hardening exponent , mechanics , thermodynamics , physics , layer (electronics)

International audienceWe address in this paper the problem of blow molding for a polymer exhibiting a deformation induced crystallization (e.g. Poly EthyleneTerephthalate or PET). In a first part, we give the equations of a model that couples the mechanics to the crystallization for a class of molecular models (e.g. Maxwell or POM-POM models). In a second part, without a real stabilities analysis, we follow the Swift analysis for biaxial deformations. We conclude this study in showing that it is possible to quantify how crystallization during the process stabilizes it. In enhancing strongly the strain hardening, crystallization is namely a stability factor against necking

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