선체 Longi-web 연결부의 피로강도 평가를 위한 구조응력 기법의 적용
The Application of Structural Stress Method for the Fatigue Strength Assessment of Longi-web Connections
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초록
Recently, a mesh-size insensitive structural stress definition that provides a stress state at weld toe with relatively larger mesh size compared to conventional approaches has been proposed. The structural stress definition is based on the elementary structural mechanics theory and provides an effective measure of a stress state in front of weld toe. In this study, as an experimental validation of structural stress method in obtaining the fatigue strength of weldments, a series of fatigue test has carried out for longi-web connections, which are representative of ship-like structures. Based on the result from this study, it is expected to develop a more precise fatigue strength evaluation technique and to reduce time and cost associated with the fatigue design of ship and offshore structures.
Abstract
Recently, a mesh-size insensitive structural stress definition that provides a stress state at weld toe with relatively larger mesh size compared to conventional approaches has been proposed. The structural stress definition is based on the elementary structural mechanics theory and provides an effective measure of a stress state in front of weld toe. In this study, as an experimental validation of structural stress method in obtaining the fatigue strength of weldments, a series of fatigue test has carried out for longi-web connections, which are representative of ship-like structures. Based on the result from this study, it is expected to develop a more precise fatigue strength evaluation technique and to reduce time and cost associated with the fatigue design of ship and offshore structures.
참고문헌 (4)
- Battelle Structural stress JIP Final Report, "Battelle", ~, pp.N004431-01 (2004)
- A Mesh Insensitive Stress Procedure for Fatigue Evaluation of Welded Structures, "Dong, P.", International Institute of Welding, ~, pp.ⅩⅢ-1902-01 (2001), ⅩⅤ-1089-01
- 김명현, "필릿 용접구조물의 피로해석을 위한 기준응력에 대한 비교 연구", 대한조선학회 논문집, 43(4), pp.476~483 (2006), 대한조선학회
- Kim, Y.I., "A Study on the Performance of Mesh Insensitive Structural Stress for Fatigue Strength Evaluation", Proceedings of the 2005 Spring Annual Meeting of the Naval Architects of Korea, pp.965~970 (2005)