Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지
DOI QR코드

DOI QR Code

Verification of Validity of Governing Factors in High Accurate Prediction of Welding Distortion

용접변형의 고정도 예측을 위한 지배인자의 정당성 검증

  • 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
Download PDF
⟨ Previous Next ⟩

Abstract

The legitimacy of dominating factor in the high accuracy prediction of welding distortion was investigated for butt welding and fillet welding. When out-of-plane distortion was measured by the experiment objecting to butt welding, if tack welding was easily performed, the position of a neutral axis was variously changed by the irregularity. Then, there have been a case that out-of-plane distortion was generated in the unexpected direction. This case should be especially noted. New model for the experiment was proposed so as to solve this problem. As it was elucidated by the case of fillet welding, it was verified that the analysis should be carried out with satisfying the yield condition (especially at high temperature above 700 degree Celsius) and with closely simulating the penetration shape (heat input in weld metal) in order to solve the proposition that is the high accuracy prediction of welding distortion. It was confirmed that residual stress is highly predicted because welding distortion is highly predicted, too.

Keywords

References

  1. For example, WATANABE M., SATOH K.: Welding Mechanics and its application, Asakura-shoten, (1965), (in Japanese)
  2. KIM Y.-C., LEE J.-Y., INOSE K.: The High Accurate Prediction of Welding Distortion Generated by Fillet Welding, Quart. J. of JWS, 23-3(2005), 431-435 (in Japanese)
  3. KIM Y.-C., CHANG K.-H., HORIKAWA K.: Production Mechanisms for Out-of-plane Deformation in Fillet Welding and Investigation of Generality, Quart. J. of JWS, 17-2(1999), 294-300 (in Japanese)
  4. KIM Y.-C.: Development of Tool for Predicting Welding Distortion with High Accuracy, Nat. Meet. of JWS, Special Session, 2003, 21-22 (in Japanese)
  5. Bang, Han-Sur, You-Chul Kim: Analysis on The Three-Dimensional Unstationary Heat Conduction on The Welding of Thick Plate by F.E.M., J. of KWS, 9-2 (1991), 37-43 (in Korean)
  6. Bang, Han-Sur: Study on the Mechanical Behavior of Welded part in thick Plate - Three-dimensional Thermal Elasto-Plastic Analysis Based on Finite Element Method, J. of KWS, 10-4 (1992), 250-258 (in Korean)