Journal of Welding and Joining

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

연속체 손상역학을 이용한 수치 피로시험 기법

  • 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) ;
  • Lee, Jae-Myung (Dept. of Naval Architecture & Ocean Engineering, Pusan National University)
  • 이치승 (부산대학교 공과대학 조선해양공학과) ;
  • 김영환 (부산대학교 공과대학 조선해양공학과) ;
  • 김태우 (부산대학교 공과대학 조선해양공학과) ;
  • 이제명 (부산대학교 공과대학 조선해양공학과)
  • Published : 2007.02.28
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Abstract

Once assessment of material failure characteristics is captured precisely in a unified way, it can bedirectly incorporated into the structural failure assessment under various loading environments, based on the theoretical backgrounds so called Local Approach to Fracture. The aim of this study is to develop a numerical fatigue test method by continuum damage mechanics applicable for the assessment of structural integrity throughout crack initiation and structural failure based on the Local Approach to Fracture. The generalized elasto-visco-plastic constitutive equation, which can consider the internal damage evolution behavior, is developed and employed in the 3-D FEA code in order to numerically evaluate the material and/or structural responses. Explicit information of the relationships between the mechanical properties and material constants, which are required for the mechanical constitutive and damage evolution equations for each material, are implemented in numerical fatigue test method. The material constants selected from constitutive equations are used directly in the failure assessment of material and/or structures. The performance of the developed system has been evaluated with assessing the S-N diagram of stainless steel materials.

Keywords

References

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  1. Numerical Fatigue Test Method of Welded Structures Based on Continuum Damage Mechanics vol.26, pp.3, 2008, https://doi.org/10.5781/KWJS.2008.26.3.067
  2. Numerical Analysis Model for Fatigue Life Prediction of Welded Structures vol.27, pp.6, 2009, https://doi.org/10.5781/KWJS.2009.27.6.049
  3. Overview of Research works regarding Strength field of the Journal of KWJS for Last 10 Years vol.29, pp.2, 2011, https://doi.org/10.5781/KWJS.2011.29.2.028