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


Oral A. , Anlas G., Lambros J.

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, cilt.21, ss.3-25, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 21
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1177/1056789510385261
  • Dergi Adı: INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
  • Sayfa Sayıları: ss.3-25

Özet

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.