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원전 노즐 용접부 잔류응력 예측을 위한 Round Robin 해석 결과 분석
송태광(Tae-Kwang Song),배홍렬(Hong-Yeol Bae),김윤재(Yun-Jae Kim),이경수(Kyoung-Soo Lee),박치용(Chi-Yong Park),양준석(Jun-Seog Yang),허남수(Nam-Su Huh),김종욱(Jong-Wook Kim),박준수(June-Soo Park),송민섭(Min-Sup Song),이승건(Seung-Gun 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.1
This paper provides simulational round robin test results for welding residual stress prediction of safety/relief nozzle. To quantify the welding variables and define the recommendation for prediction and determination of welding residual stress, 6 partners in 5 institutes participated in round robin test. It is concluded that compressive axial and hoop residual stress occurs in dissimilar metal weld and pre-existing residual stress distribution in dissimilar metal weld was affected by similar metal weld due to short length of safe end. Although the reason for the deviation among the results was not pursued further, the effect of several key elements of FE analyses on welding residual stress was investigated in this paper.