Application of the GTN model to quantify constraint effects on ductile fracture of API X65 steels

Yun-Jae Kim, Chang Kyun Oh, Chang Sik Oh

Research output: Contribution to journalArticle

Abstract

This paper quantifies the effects of geometry, the loading mode and the specimen size on fracture toughness of the API X65 steel, via plane strain finite element (FE) damage analyses using the GTN model. The validity of FE damage analyses is checked first by comparing with experimental test data for small-sized, cracked bar test. Then the analyses are extended to investigate the effects of the relative crack depth and the specimen size on fracture toughness. It is shown that fracture toughness of the API X65 steel increases with decreasing the relative crack depth and increasing the specimen size.

Original languageEnglish
Pages (from-to)667-670
Number of pages4
JournalKey Engineering Materials
Volume324-325 II
Publication statusPublished - 2006 Nov 16

Keywords

  • API X65
  • Constraint effect
  • FE damage analysis
  • Fracture toughness
  • GTN model

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

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