Extracting ductile fracture toughness from small punch test data using numerical modeling

Jun Young Jeon, Yun Jae Kim, Sa Yong Lee, Jin Weon Kim

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


This paper presents a numerical method to extract ductile fracture toughness from notched small punch test data using FE ductile damage analysis based on the stress-modified fracture strain model. To validate the proposed method, analysis results are compared with series of mechanical (notched tensile, fracture toughness and small punch) test data for three different materials; low alloy steel SA508 Gr.3, TP316L austenitic stainless steel and CF8M cast austenitic stainless steel. Comparison with experimental fracture toughness data shows that the proposed method can predict fracture initiation values relatively well and tearing resistance conservatively.

Original languageEnglish
Pages (from-to)204-219
Number of pages16
JournalInternational Journal of Pressure Vessels and Piping
Publication statusPublished - 2016 Mar 1
Externally publishedYes


  • Ductile fracture simulation
  • Finite element damage analysis
  • Fracture toughness estimation
  • Notched small punch test
  • Stress-modified fracture strain

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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