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 journalArticle

Abstract

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
JournalFatigue and Fracture of Engineering Materials and Structures
DOIs
Publication statusAccepted/In press - 2019 Jan 1
Externally publishedYes

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Keywords

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

ASJC Scopus subject areas

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

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