Thermoforming process of amorphous polymeric sheets: Modeling and finite element simulations

A. Makradi, S. Belouettar, S. Ahzi, S. Puissant

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A temperature and strain rate dependent model for the thermoforming process of amorphous polymer materials is proposed. The polymeric sheet is heated at a temperature above the glass transition temperature then deformed to take the mold shape by the means of an applied pressure. The applied process temperature is taken uniform throughout the sheet and its variation is due only to the adiabatic heating. The behavior of the polymeric material is described by a micromechanicallybased elastic-viscoplastic model. The simulations are conductedfor the poly(methyl methacrylate) using the finite element method. The polymer sheet thickness and the orientation of the polymer molecular chains show an important dependence on the process temperature, the applied pressure profile, and the contact forces with the mold surface.

Original languageEnglish
Pages (from-to)1718-1724
Number of pages7
JournalJournal of Applied Polymer Science
Volume106
Issue number3
DOIs
Publication statusPublished - 5 Nov 2007

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Keywords

  • Finite element method
  • Micromechanical model
  • Poly(methyl methacrylate)
  • Polymer thermoforming

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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