Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Effect of Weld Elastic Modulus on Simulation of Stress Concentration and Fatigue Life for Boiler Vessel

ADINA & WINLIFE 활용한 압력용기 용접부 피로파괴 해석

  • Choe, Byung Hak (Dept. of Ad. Metal & Materials Sci. Eng., Gangneung-Wonju National Univ.) ;
  • Lee, Bum Gyu (Dept. of Ad. Metal & Materials Sci. Eng., Gangneung-Wonju National Univ.) ;
  • Shim, Jong Heon (Dept. of Ad. Metal & Materials Sci. Eng., Gangneung-Wonju National Univ.) ;
  • Park, Chan Sung (Forensic Engineering Department, National Forensic Service) ;
  • Kim, Jin Pyo (Forensic Engineering Department, National Forensic Service) ;
  • Park, Nam Gyu (Forensic Engineering Department, National Forensic Service)
  • 최병학 (강릉원주대학교 신소재금속공학과) ;
  • 이범규 (강릉원주대학교 신소재금속공학과) ;
  • 심종헌 (강릉원주대학교 신소재금속공학과) ;
  • 박찬성 (국립과학수사연구원) ;
  • 김진표 (국립과학수사연구원) ;
  • 박남규 (국립과학수사연구원)
  • Received : 2016.03.15
  • Accepted : 2016.06.27
  • Published : 2016.10.31
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Abstract

The aim of this study is to consider effect of weld elastic modulus on simulations of stress concentration and fatigue life for pressure vessel. The investigations include analysis with ADINA and WINLIFE softwares for whole body model about using condition of the boiler vessel. Values of weld elastic modulus were divided by 5 steps in butt weld area of the boiler vessel body. The stress concentration of the butt weld more was increased in case of higher elastic modulus of weld area because of higher difference of material properties between matrix and weld. It was concluded that the fatigue lives were decreased along increasing stress concentration due to high elastic modulus of weld. The matrix microstructure was estimated as pearlitic structure of ${\alpha}$ ferrite and pearlite. And the microstructures of welds along 5 steps of elastic modulus were estimated as bainitic fine pearlite and martensite as increasing elastic modulus.

Keywords

References

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