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원전 이종 금속 다층 용접부 잔류응력 예측을 위한 유한요소 변수 민감도 해석
Sensitivity Analyses of Finite Element Method for Estimating Residual Stress of Dissimilar Metal Multi-Pass Weldment in Nuclear Power Plant
- 김윤재;
- 송태광;
- 배홍열;
- 이경수;
- 박치용
초록
In nuclear power plants, ferritic low alloy steel components were connected with austenitic stainless steel piping system through alloy 82/182 butt weld. There have been incidents recently where cracking has been observed in the dissimilar metal weld. Alloy 82/182 is susceptible to primary water stress corrosion cracking. Weld-induced residual stress is main factor for crack growth. Therefore exact estimation of residual stress is important for reliable operating. This paper presents residual stress computation performed by 6” safety & relief nozzle. Based on 2 dimensional and 3 dimensional finite element analyses, effect of welding variables on residual stress variation is estimated for sensitivity analysis
키워드
잔류 응력; 이종금속용접; 일차수응력부식균열; 민감도 해석; Residual Stress; Dissimilar Metal Weld; PWSCC; Sensitivity Analysis
- 제목
- 원전 이종 금속 다층 용접부 잔류응력 예측을 위한 유한요소 변수 민감도 해석
- 제목 (타언어)
- Sensitivity Analyses of Finite Element Method for Estimating Residual Stress of Dissimilar Metal Multi-Pass Weldment in Nuclear Power Plant
- 저자
- 김윤재; 송태광; 배홍열; 이경수; 박치용
- 발행일
- 2008
- 저널명
- 대한기계학회논문집 A
- 권
- 32
- 호
- 9
- 페이지
- 770 ~ 781