Characterisation and modelling of anisotropic thermo-mechanical behaviour of oriented polyethylene terephthalate

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The long-term and short-term anisotropic mechanical behaviour of a biaxially stretched polyethylene terephthalate foil is measured. The orientation of the crystalline phase is characterized and the representative foil microstructure is discussed. Using the obtained information, a mean-field model is used to simulate the elasto-viscoplastic behaviour of the oriented polymer foil, taking into account the different constitutive behaviour of the phases. The material is modelled as an aggregate of connected two-phase domains. The parameters of the constitutive behaviour of the crystalline and non-crystalline phases have been determined, and the ability to simulate the large-strain anisotropic behaviour of polyethylene terephthalate in the strain-rate- controlled regime and the long-term creep has been demonstrated. The model is extended to include pre-orientation of the non-crystalline phase. In addition, deformation at the microscopic level is analysed using the model results. © 2014 IOP Publishing Ltd.

Originele taal-2Engels
Artikelnummer055024
Aantal pagina's30
TijdschriftModelling and Simulation in Materials Science and Engineering
Volume22
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 1 jul 2014

Vingerafdruk

Polyethylene Terephthalates
polyethylene terephthalate
Mechanical Behavior
Polyethylene terephthalates
Metal foil
Constitutive Behavior
foils
Modeling
Crystalline materials
Crystal orientation
Large Strain
Mean-field Model
Strain rate
Polymers
Creep
Strain Rate
Microstructure
strain rate
microstructure
Model

Citeer dit

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abstract = "The long-term and short-term anisotropic mechanical behaviour of a biaxially stretched polyethylene terephthalate foil is measured. The orientation of the crystalline phase is characterized and the representative foil microstructure is discussed. Using the obtained information, a mean-field model is used to simulate the elasto-viscoplastic behaviour of the oriented polymer foil, taking into account the different constitutive behaviour of the phases. The material is modelled as an aggregate of connected two-phase domains. The parameters of the constitutive behaviour of the crystalline and non-crystalline phases have been determined, and the ability to simulate the large-strain anisotropic behaviour of polyethylene terephthalate in the strain-rate- controlled regime and the long-term creep has been demonstrated. The model is extended to include pre-orientation of the non-crystalline phase. In addition, deformation at the microscopic level is analysed using the model results. {\circledC} 2014 IOP Publishing Ltd.",
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Characterisation and modelling of anisotropic thermo-mechanical behaviour of oriented polyethylene terephthalate. / Poluektov, M.; Dommelen, van, J.A.W.; Govaert, L.E.; Geers, M.G.D.

In: Modelling and Simulation in Materials Science and Engineering, Vol. 22, Nr. 5, 055024, 01.07.2014.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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AB - The long-term and short-term anisotropic mechanical behaviour of a biaxially stretched polyethylene terephthalate foil is measured. The orientation of the crystalline phase is characterized and the representative foil microstructure is discussed. Using the obtained information, a mean-field model is used to simulate the elasto-viscoplastic behaviour of the oriented polymer foil, taking into account the different constitutive behaviour of the phases. The material is modelled as an aggregate of connected two-phase domains. The parameters of the constitutive behaviour of the crystalline and non-crystalline phases have been determined, and the ability to simulate the large-strain anisotropic behaviour of polyethylene terephthalate in the strain-rate- controlled regime and the long-term creep has been demonstrated. The model is extended to include pre-orientation of the non-crystalline phase. In addition, deformation at the microscopic level is analysed using the model results. © 2014 IOP Publishing Ltd.

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