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Simulation of the stretch blow moulding process: from the modelling of the microstructure evolution to the end-use elastic properties of polyethylene terephthalate bottles

Article dans une revue avec comité de lecture
Author
COSSON, Benoit
84321 Laboratoire de Modélisation et Simulation Multi Echelle [MSME]
CHEVALIER, Luc
84321 Laboratoire de Modélisation et Simulation Multi Echelle [MSME]
ccREGNIER, Gilles
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/6815
DOI
10.1007/s12289-010-1010-y
Date
2012
Journal
International Journal of Material Forming

Abstract

The whole stretch blow-moulding process of PET bottles is simulated at the usual process temperature in order to predict the elastic end-use properties of the bottles. An anisotropic viscoplastic constitutive law, coupled with microscopic variables, is dentified from uniaxial tensile tests performed at different strain rates and temperatures. The microstructure evolution is characterised by crystallinity measurements from interrupted tests and frozen samples. For each specimen tested, the Young modulus is measured at room temperature. Numerical simulations of the blow moulding process are run using the C-NEM method. A micromechanical modelling is post-processed after the simulation to predict the elastic properties. Predictions of Young modulus distributions in bottles are in agreement with the ones measured on blow-moulded bottles.

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