Numerical prediction of notch bluntness effect on fracture resistance of SM490A carbon steel

Gyo Geun Youn, Ji Soo Kim, Yun Jae Kim, Masayuki Kamaya

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The present work investigates the notch radius effect on fracture resistance using the finite element (FE) damage analysis based on the multiaxial fracture strain model. The damage model was determined from experimental data of notched bar tensile and fracture toughness test data using a sharp-cracked compact tension specimen. Then, the FE damage analysis was applied to simulate fracture resistance tests of SM490A carbon steel specimens with different notch radii. Comparison of simulated results with experimental data showed good agreement. Further simulation was then performed to see effects of the specimen size, thickness, and side groove on J-R curves for different notch radii. It was found that effects of the specimen size and thickness became more pronounced for the larger notch radius. Furthermore, it was found that without side groove, tearing modulus for notched specimens was similar to that for cracked specimens, regardless of the notch radius.

Original languageEnglish
Pages (from-to)660-671
Number of pages12
JournalFatigue and Fracture of Engineering Materials and Structures
Issue number4
Publication statusPublished - 2020 Apr 1

Bibliographical note

Funding Information:
This research was funded by the National Research Foundation of Korea (NRF) supported by the Ministry of Science, ICT, and Future Planning (NRF‐2016M2A8A1952771).

Publisher Copyright:
© 2019 Wiley Publishing Ltd.


  • J-R curve
  • finite element damage analysis
  • multiaxial fracture strain model
  • notched compact tension specimen

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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