Determination of Gurson-Tvergaard-Needleman Model Parameters for Failure of a Polymeric Material


Oral A. , Anlas G., Lambros J.

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, vol.21, pp.3-25, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21
  • Publication Date: 2012
  • Doi Number: 10.1177/1056789510385261
  • Title of Journal : INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
  • Page Numbers: pp.3-25
  • Keywords: GTN model, damage, polymer, crazing, parameter determination, finite-element analysis, DUCTILE CRACK-GROWTH, VOID NUCLEATION, DAMAGE BEHAVIOR, FRACTURE, IDENTIFICATION, PREDICTION, CRITERIA, FLOW

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.