A finite element ductile failure simulation method using stress-modified fracture strain model

Chang Sik Oh, Nak Hyun Kim, Yun Jae Kim, Jong Hyun Baek, Young Pyo Kim, Woo Sik Kim

Research output: Contribution to journalArticle

149 Citations (Scopus)

Abstract

This paper proposes a new method to simulate ductile failure using finite element analysis based on the stress-modified fracture strain model. A procedure is given to determine the stress-modified fracture strain as a function of the stress triaxiality from smooth and notched bar tensile tests with FE analyses. For validation, simulated results using the proposed method are compared with experimental data for cracked bar (tensile and bend) tests, extracted from API X65 pipes, and for full-scale burst test of gouged pipes, showing overall good agreements. Advantages in the use of the proposed method for practical structural integrity assessment are discussed.

Original languageEnglish
Pages (from-to)124-137
Number of pages14
JournalEngineering Fracture Mechanics
Volume78
Issue number1
DOIs
Publication statusPublished - 2011 Jan

Keywords

  • Ductile fracture simulation
  • Finite element analysis
  • Stress-modified fracture strain

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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