Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Numerical Fatigue Test Method of Welded Structures Based on Continuum Damage Mechanics

연속체 손상역학을 이용한 용접구조물의 수치피로시험기법

  • Lee, Chi-Seung (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Young-Hwan (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Tae-Woo (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Yoo, Byung-Moon (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Lee, Jae-Myung (Dept. of Naval Architecture & Ocean Engineering, Pusan National University)
  • 이치승 (부산대학교 공과대학 조선해양공학과) ;
  • 김영환 (부산대학교 공과대학 조선해양공학과) ;
  • 김태우 (부산대학교 공과대학 조선해양공학과) ;
  • 유병문 (부산대학교 공과대학 조선해양공학과) ;
  • 이제명 (부산대학교 공과대학 조선해양공학과)
  • Published : 2008.06.30
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Abstract

Fatigue life evaluation of welded structures in a range of high cycles is one of the most difficult problems since extremely small plastic deformation and damage occur during the loading cycles. Moreover, it is very difficult to identify the strong non-linearities of welding, inducing residual stress. In this paper, numerical fatigue test method for welded structures was developed using continuum damage mechanics with inherent strain. Recently, continuum damage mechanics, which can simulate both crack initiation at the micro-scale level and crack propagation at the meso-scale level, has been adopted in the fracture related problem. In order to consider the residual stresses in the welded strictures, damage calculation in conjunction with welding, inducing inherent strain, was proposed. The numerical results obtained from the damage calculation were compared to experimental results.

Keywords

References

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