Nuclear Engineering and Technology

  • 제54권7호
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  • Pages.2386-2394
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  • 2022
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Effect of strain rate and stress triaxiality on fracture strain of 304 stainless steels for canister impact simulation

  • Seo, Jun-Min (Department of Mechanical Engineering, Korea University Seoul) ;
  • Kim, Hune-Tae (Department of Mechanical Engineering, Korea University Seoul) ;
  • Kim, Yun-Jae (Department of Mechanical Engineering, Korea University Seoul) ;
  • Yamada, Hiroyuki (Department of Mechanical Engineering, National Defense Academy of Japan) ;
  • Kumagai, Tomohisa (Materials Science Division, Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry) ;
  • Tokunaga, Hayato (Materials Science Division, Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry) ;
  • Miura, Naoki (Materials Science Division, Energy Transformation Research Laboratory, Central Research Institute of Electric Power Industry)
  • 투고 : 2021.11.09
  • 심사 : 2022.02.03
  • 발행 : 2022.07.25
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초록

In this paper, smooth and notched bar tensile tests of austenitic stainless steel 304 are performed, covering four different multi-axial stress states and six different strain rate conditions, to investigate the effect of the stress triaxiality and strain rate on fracture strain. Test data show that the measured true fracture strain tends to decrease with increasing stress triaxiality and strain rate. The test data are then quantified using the Johnson-Cook (J-C) fracture strain model incorporating combined effects of the stress triaxiality and strain rate. The determined J-C model can predict true fracture strain overall conservatively with the difference less than 20%. The conservatism in the strain-based acceptance criteria in ASME B&PV Code, Section III, Appendix FF is also discussed.

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과제정보

Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.NRF-2019M2D2A2048296). We acknowledge to Mr. Tsunemoto Yoshik, CRIEPI to obtain supporting experimental results.

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