Determination of Gurson-Tvergaard-Needleman model parameters for failure of a polymeric material

Alpay Oral, Gunay Anlas, John Lambros

Research output: Contribution to journalArticle

Abstract

In this work, the Gurson-Tvergaard-Needleman model, commonly used for metallic materials, is applied to the failure of a polymeric material-specifically a polyethylene carbon monoxide copolymer, which is an enhanced photodegradable material. Gurson-Tvergaard-Needleman model parameters for this material are obtained using the Nelder-Mead simplex method when correlating experimental and numerical results of both tensile and fracture specimens. Results show that the Gurson-Tvergaard-Needleman model can also be used for polymeric materials with selection of proper parameters that are quite different from the ones proposed for metallic materials.

Original languageEnglish (US)
Pages (from-to)3-25
Number of pages23
JournalInternational Journal of Damage Mechanics
Volume21
Issue number1
DOIs
StatePublished - Jan 1 2012

Keywords

  • GTN model
  • crazing
  • damage
  • finite-element analysis
  • parameter determination
  • polymer

ASJC Scopus subject areas

  • Computational Mechanics
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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