Development of small bulge fatigue testing technique using small disk-type specimen

Shin ichi Komazaki, Ryuichiro Jojima, Nanna Muraoka, Shuhei Nogami, Masayuki Kamaya, Chiaki Hisaka, Masaharu Fujiwara, Akito Nitta

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


A new fatigue testing technique, the small bulge fatigue (SBF) test using a small disk-type specimen with flat and concave surfaces, was developed in this study. In the technique, a cyclic oil pressure could be alternatively applied to both specimen surfaces at the frequency of 10 Hz. After some verification tests for the displacement and strain measurements, type 316 austenitic stainless steel specimens were subjected to a preliminary test using this newly developed testing technique. As a result, the SBF test results (S-N curve) were in good agreement with those of conventional fatigue tests by defining fatigue life as the number of cycles to the sudden drop in oil pressure because of fracture.

Original languageEnglish
Pages (from-to)444-456
Number of pages13
JournalFatigue and Fracture of Engineering Materials and Structures
Issue number3
Publication statusPublished - 2020 Mar 1


  • fatigue
  • fatigue life
  • hydraulic bulge method
  • small punch test
  • small specimen testing technique

ASJC Scopus subject areas

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


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