A phenomenological model of ductile fracture for API X65 steel

Chang Kyun Oh, Yun Jae Kim, Jong Hyun Baek, Young Pyo Kim, Woosik Kim

Research output: Contribution to journalArticlepeer-review

106 Citations (Scopus)


This paper presents a phenomenological model of ductile fracture for the API X65 steel using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars, from which the parameters in the GTN model are calibrated. Comparison of experimental data of pre-strained, notched tensile and fracture toughness tests with finite element (FE) damage analyses show good agreements, suggesting the validity of the calibrated parameters. As application, the developed GTN model is applied to predict the pre-strain effect on deformation and fracture and the results are compared with experimental data.

Original languageEnglish
Pages (from-to)1399-1412
Number of pages14
JournalInternational Journal of Mechanical Sciences
Issue number12
Publication statusPublished - 2007 Dec


  • API X65
  • Ductile fracture
  • GTN model
  • Pre-strain

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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