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Journal of KWJS 2008;26(6):97-102.
Published online January 13, 2009.
응력확대계수를 이용한 하중 전달형 필릿 용접부의 피로강도 평가에 관한 연구
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A Study on the Fatigue Life Assessment for Load-carrying Fillet Welded Joints using Stress Intensity Factor
Myung-Hyun Kim, Sung-Won Kang, Hyoung-Rae Kim
Abstract
  It is well known that there exist two typical fatigue crack initiation locations in ship structures: one is the weld toe and the other is the weld root where partial penetration weld is performed. In particular, it is important for fillet weldments to avoid weld root cracking in order to prevent catastrophic failure particularly in ship structures. Therefore detail considerations are required for cruciform joints with partial penetration when there is a possibility of weld root crack initiation. For these reasons, fatigue tests on welded joints were performed in this study. Concept of stress intensity factor(SIF) by means of fracture mechanics is applied for predicting fatigue life of fillet welded joints.
Key Words: Fatigue, Fillet joints, Weld toe, Weld root, Stress intensity factor
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