In this study, Johnson-Cook fracture strain model considering the effect of stress triaxiality and strain rate is determined for austenitic stainless steel 304. Tensile test data of four different stress triaxiality and six different strain rate conditions are used to determine the parameters in the J-C fracture strain model. To see the effect of local variation of stress triaxiality and strain rate in the specimen, the J-C fracture models are determined in two different ways. The first case uses the initial stress triaxiality and nominal strain rate, and the second case uses the average value of local stress triaxiality and strain rate obtained from finite element analysis. The use of initial stress triaxiality gives conservative estimate of fracture strain at low stress triaxiality, and non-conservative estimate at high stress triaxiality. The use of nominal strain rate gives overall conservative estimate of fracture strain.
|Title of host publication
|Materials and Fabrication
|American Society of Mechanical Engineers (ASME)
|Published - 2022
|ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States
Duration: 2022 Jul 17 → 2022 Jul 22
|American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
|ASME 2022 Pressure Vessels and Piping Conference, PVP 2022
|22/7/17 → 22/7/22
Bibliographical noteFunding Information:
Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.NRF-2019M2D2A2048296).
Copyright © 2022 by ASME.
- Austenitic stainless steel
- Johnson-Cook fracture strain model
- Strain rate
- Stress triaxiality
ASJC Scopus subject areas
- Mechanical Engineering