Browse > Article

A Study on the Thermal and Mechanical Characteristic of Hybrid Welded Ship Structure A-grade Steel  

Oh, Chong-In (Department of Ocean & Naval Architecture Engineering, Chosun University)
Kim, Young-Pyo (Department of Ocean & Naval Architecture Engineering, Chosun University)
Park, Ho-Kyung (Department of Ocean & Naval Architecture Engineering, Chosun University)
Bang, Han-Sur (Department of Aerospace & Naval Architecture Engineering, Chosun University)
Publication Information
Journal of Ocean Engineering and Technology / v.21, no.1, 2007 , pp. 64-68 More about this Journal
Abstract
Recently, there has been considerable research in the field of application of Laser-Arc hybrid welding for superstructures, such as ship-structures, transport vehicles etc. However, the study on heat distribution and welding residual stress of hybrid weld by numerical simulation leaves much to be desired. Therefore, in this study, an optimized welding condition and numerical simulation for hybrid welding, using previous numerical analysis to calculate the heat source for hybrid welding, has been analyzed. For this purpose, fundamental welding phenomena of the hybrid process, using Laser and, is investigated. In order to calculate temperature and residual stress distribution in hybrid welds, a finite element heat source model is developed on the basis of experimental results and characteristics of temperature. Residual stress distribution in hybrid welds are understood from the result of simulation, and compared with the experimental values.
Keywords
Ship structure A-grade steel; A-grade; Hybrid welding; Finite element method; Welding residual stress; Heat source model; Optimized welding condition;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kaplan, A.F.H., Zimmerma, J., Schuocker, D. and Spruzina, W. (1997). 'Laser beam welding of aluminium alloys,' International Conference Welding Technology, Materials and Materials Testing, Fracture Mechanics and Quality Management, Vienna University of Technology, pp 147-156
2 방한서, 이진욱 (2005). 'A Study on the Reliability Evalution of Hybrid(CW Nd:YAG Laser + MIG) Welding of Butt Joints in Al -Mg Alloy', 한국해양공학회 추계학술대회, pp 575
3 Nielsen, S.E., Andersen, M.M. and Kristensen, J.K. (2002). 'Hybrid welding of thick section C/Mn steel and aluminium,' IIW-DOC.XII, pp 258-272
4 방한서, 김영표 (2003) '유한요소해석을 위한 하이브리드 용접 입열모델 선정에 관한 기초적 연구', 대한용접학회 Vol 41, pp 3638