Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Evaluation of the Plastic η-Factor Considering Strength Mismatch in a Narrow Gap Welding Part (I)

협계용접부 강도 불균일을 고려한 소성 η계수 평가 (I)

  • 허용 (성균관대학교 기계공학부) ;
  • 김형익 (성균관대학교 기계공학부) ;
  • 선광상 (성균관대학교 대학원 기계공학과) ;
  • 구재민 (성균관대학교 기계공학부) ;
  • 석창성 (성균관대학교 기계공학부)
  • Published : 2008.06.01
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Abstract

This study evaluated the influence of the strength mismatch of HAZ for a plastic ${\eta}$-factor, which is the principle parameter determining the plastic portion of J-integral to assess the fracture toughness of the weldment. The specimen of tensile and hardness test was manufactured from the piping applying narrow-gap welding, and the mechanical properties of weldment, HAZ and a base metal were obtained. To perform the finite element analysis according to the ratio of strength mismatch, the material properties was chosen with the change of strength using the determination method of Ramberg-Osgood constant. Also, the influence of the strength mismatch of HAZ was determined using finite element analysis by those properties.

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References

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