Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Prediction of Welding Imperfection with Idealization of Welding and Their Accuracy

용접이상화에 의한 용접부정의 예측과 정도

  • 이재익 (포항산업과학연구원 강구조연구소) ;
  • 장경호 (중앙대학교 사회기반 시스템 공학부 건설환경플랜트전공) ;
  • 김유철 (일본국립대학법인 오사카대학 접합과학연구소)
  • Received : 2013.10.21
  • Accepted : 2013.10.30
  • Published : 2013.10.31
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Abstract

In order to reduce a grand compute time in prediction of welding distortion and residual stress by 3D thermal elastic plastic analysis, idealization of welding that is methods to heat input simultaneously in all weld metal on the same welding direction is carried out on two weld joints(butt welding and fillet welding). Then, the accuracy of acquired results is investigated through the comparison of the high accuracy prediction results. The thermal conduction analysis results by idealization of welding, the temperature is raised accompany with beginning of heat input because all of weld metal is heated input at the same time. On the other side, the temperature witch predicted with high accuracy is raised at the moment heating source passes the measuring points. So, there is difference of time between idealization of welding and considering of moving heat source faithfully. However, temperature history by idealization of welding is well simulated a high accuracy prediction results.

Keywords

References

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