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Fatigue Life Analysis and Prediction of 316L Stainless Steel Under Low Cycle Fatigue Loading

저사이클 피로하중을 받는 316L 스테인리스강의 피로수명 분석 및 예측

  • Oh, Hyeong (Dept. of Mechanical Engineering, Hanyang Univ.) ;
  • Myung, NohJun (Dept. of Mechanical Engineering, Hanyang Univ.) ;
  • Choi, Nak-Sam (Dept. of Mechanical Engineering, Hanyang Univ.)
  • 오혁 (한양대학교 기계공학과) ;
  • 명노준 (한양대학교 기계공학과) ;
  • 최낙삼 (한양대학교 기계공학과)
  • Received : 2016.06.01
  • Accepted : 2016.09.11
  • Published : 2016.12.01

Abstract

In this study, a strain-controlled fatigue test of widely-used 316L stainless steel with excellent corrosion resistance and mechanical properties was conducted, in order to assess its fatigue life. Low cycle fatigue behaviors were analyzed at room temperature, as a function of the strain amplitude and strain ratio. The material was hardened during the initial few cycles, and then was softened during the long post period, until failure occurred. The fatigue life decreased with increasing strain amplitude. Masing behavior in the hysteresis loop was shown under the low strain amplitude, whereas the high strain amplitude caused non-Masing behavior and reduced the mean stress. Low cycle fatigue life prediction based on the cyclic plastic energy dissipation theory, considering Masing and non-Masing effects, showed a good correlation with the experimental results.

Keywords

Low Cycle Fatigue;Mean Stress;Stress Relaxation;Strain Energy Density

Acknowledgement

Supported by : 한국연구재단

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