수정 S-N곡선법을 이용한 용접연결부의 피로수명 추정
Modified S-N Curve Method to Estimate Fatigue life of Welded Joints
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초록
In this paper, the effects of irregular bead shapes on fatigue life were investigated. A modified S-N curve method was used to estimatethe fatigue life, which considered the inherent multiaxiality caused by the geometrical feature produced by the welding process. The point method of the critical distance method was used to determine the fatigue effective stress. Three types of fillet joint models were tested in the fatigue experiments. For each model, real bead shapes were collected using a 3D laser scanner, and finite element analyses were performed. The results of the analyses with actual bead shapes were compared with those using an idealized bead shape model. The results of the present analytical methods showed good agreement with the experimental results.
Abstract
In this paper, the effects of irregular bead shapes on fatigue life were investigated. A modified S-N curve method was used to estimatethe fatigue life, which considered the inherent multiaxiality caused by the geometrical feature produced by the welding process. The point method of the critical distance method was used to determine the fatigue effective stress. Three types of fillet joint models were tested in the fatigue experiments. For each model, real bead shapes were collected using a 3D laser scanner, and finite element analyses were performed. The results of the analyses with actual bead shapes were compared with those using an idealized bead shape model. The results of the present analytical methods showed good agreement with the experimental results.
참고문헌 (10)
- Brown, M.W., "A Theory for Fatigue under Multiaxial Stress-strain Conditions", Proceedings of the Institution of Mechanical Engineers, 187, pp.745~755 (1973)
- European Committe for Standardization (CEN), "Eurocode3 : Design of Steel Structures, Part1-9: Fatigue(EN1993-1-9)", ~ (2005)
- 김명현, "선체 Longi-web 연결부의 피로강도 평가를 위한 구조응력 기법의 적용", 대한조선학회 논문집, 45(1), pp.81~86 (2008), 대한조선학회
- Maddox, S. J., "Fatigue Strength of Welded Structures, Second edition" (1991), Abington Publishing
- Niemi, E., "Fatigue Analysis of Welded Components", IIW-1430-00, ~ (2006)
- Susmel, L., "A Bi-parametric Wöhler Curve for High Cycle Multiaxial Fatigue Assessment", Fatigue and Fracture of Engineering Materials and Structures, 25, pp.63~78 (2002)
- Susmel, L., "On the Use of Nominal Stresses to Predict the Fatigue Strength of Welded Joints under Biaxial Cyclic Loadings", Fatigue and Fracture of Engineering, 27, pp.1005~1024 (2004)
- Susmel, L., "Modified Wöhler Curve Method, Theory of Critical Distances and EUROCODE 3: A Novel Engineering Procedure to Predict the Lifetime of Steel Welded Joints Subjected to Both Uniaxial and Multiaxial Fatigue Loadings", International Journal of Fatigue, 30, pp.888~907 (2008)
- 양박달치, "용접연결부의 실제 비드형상을 고려한 노치피로해석법", 대한조선학회 논문집, 46(4), pp.417~423 (2009), 대한조선학회
- 양박달치, "노치응력법에 의한 용접 연결부 피로수명 추정에 관한 연구", 한국해양공학회지, 25(5), pp.47~51 (2011), 한국해양공학회