Modeling of deformation behavior and strain-induced crystallization in poly(ethylene terephthalate) above the glass transition temperature

Said Ahzi, A. Makradi, R. V. Gregory, D. D. Edie

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

A constitutive model for large deformation stress-strain behavior and strain-induced crystallization in poly(ethylene terephthalate), at temperatures above the glass transition temperature, is proposed. In this model, the intermolecular resistance is treated in a composite framework where the crystalline and amorphous phases are considered as two separate resistances coupled through two different analog representations leading to the upper and the lower bound approaches. The crystallization rate is expressed following a non-isothermal phenomenological expression based on the modified Avrami equation. Our predicted results are compared to existing experimental results and good agreement is found.

Original languageEnglish
Pages (from-to)1139-1148
Number of pages10
JournalMechanics of Materials
Volume35
Issue number12
DOIs
Publication statusPublished - Dec 2003
Externally publishedYes

Fingerprint

Polyethylene Terephthalates
polyethylene terephthalate
Crystallization
Polyethylene terephthalates
glass transition temperature
crystallization
Constitutive models
analogs
Crystalline materials
composite materials
Composite materials
Temperature
temperature
Glass transition temperature

Keywords

  • Micromechanical modeling
  • PET
  • Polymer hot drawing
  • Strain-induced crystallization

ASJC Scopus subject areas

  • Mechanics of Materials

Cite this

Modeling of deformation behavior and strain-induced crystallization in poly(ethylene terephthalate) above the glass transition temperature. / Ahzi, Said; Makradi, A.; Gregory, R. V.; Edie, D. D.

In: Mechanics of Materials, Vol. 35, No. 12, 12.2003, p. 1139-1148.

Research output: Contribution to journalArticle

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AB - A constitutive model for large deformation stress-strain behavior and strain-induced crystallization in poly(ethylene terephthalate), at temperatures above the glass transition temperature, is proposed. In this model, the intermolecular resistance is treated in a composite framework where the crystalline and amorphous phases are considered as two separate resistances coupled through two different analog representations leading to the upper and the lower bound approaches. The crystallization rate is expressed following a non-isothermal phenomenological expression based on the modified Avrami equation. Our predicted results are compared to existing experimental results and good agreement is found.

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