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Fracture Analysis of Weldments Using the J-integral
Yong-Lae Shim(심용래) 한국해양공학회 1993 韓國海洋工學會誌 Vol.7 No.1
용접부의 파괴특성을 J-적분을 이용하여 유한요소법으로 해석하였다. 용접부의 열전달 해석 및 응력해석을 수행한후 crack을 도입하여 crack 주위의 잔류응력 해석을 통하여 crack tip에서의 J-적분치를 계산하였다. 이차원 및 삼차원에서의 파괴해석을 위한 modeling 과정을 소개하였으며 대표적인 계산결과를 소개하였다.
김석,심용래,배성인,송정일,Kim, Seok,Shim, Yong-Lae,Bae, Sung-In,Song, Jung-Il 대한용접접합학회 2001 대한용접·접합학회지 Vol.19 No.6
Partial penetration welding joint defines the groove welds that applies the one side welding which does not use steel backing and both side welding without back gouging, that is, the partial penetration welding joint leaves an unwelded portion at the root of the welding area. In this study, we analyzed the residual stress and fracture on the thick metal plates that introduced the partial penetration welding method. As results of using above mentioned welding method, we could draw a conclusion that longitudinal stress and traverse stress occurred around the welding area was so minimal and did not affect any influence. We also performed the fracture behavior evaluation on the partial penetration multi-pass welding with 25.4mm thick plate by using theJ-integral, which finally led us the conclusion that the partial penetration multi -pass welding method is more applicable and effective in handling the root face with less than 6.35mm.