Determination of Gurson-Tvergaard-Needleman Model Parameters for Failure of a Polymeric Material
INTERNATIONAL JOURNAL OF DAMAGE MECHANICS, cilt.21, ss.3-25, 2012 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 21
- Basım Tarihi: 2012
- Doi Numarası: 10.1177/1056789510385261
- Dergi Adı: INTERNATIONAL JOURNAL OF DAMAGE MECHANICS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.3-25
- Anahtar Kelimeler: GTN model, damage, polymer, crazing, parameter determination, finite-element analysis, DUCTILE CRACK-GROWTH, VOID NUCLEATION, DAMAGE BEHAVIOR, FRACTURE, IDENTIFICATION, PREDICTION, CRITERIA, FLOW
- Yıldız Teknik Üniversitesi Adresli: Hayır
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.