DOI QR코드

DOI QR Code

수치해석을 통한 용접구조물의 구조응력 추정에 관한 연구

On the Numerical Procedure for Estimating Structural Stress of Welded Structures

  • 강성원 (부산대학교조선해양공학과) ;
  • 김명현 (부산대학교조선해양공학과)
  • Kang, Sung-Won (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Myung-Hyun (Department of Naval Architecture & Ocean Engineering, Pusan National University)
  • 발행 : 2005.08.01

초록

A numerical procedure is proposed as a mesh-size insensitive structural stress definition that gives a stress state at a weld toe with relatively large mesh size. The structural stress values obtained using different finite element types, i.e. shell element and solid element, are examined for typical weld structures. The calculation procedures are performed using the balanced nodal forces and moments obtained from finite element solutions. A consistent formulation based on work equivalent argument has been implemented to transform the balanced nodal forces and moments from shell to line force and line moments at each nodal position. The mesh-insensitivity, the effect of distance $\delta$(where the stress is calculated) and the potential limitations of the structural stress method are examined for various types of weldments. Based on the results from this study, it is expected to develop a more precise stress estimation technique for fatigue strength assessment of welded structures.

키워드

참고문헌

  1. 강성원, 하우일, 신종석, 제정신, 1996, '필릿용접 이음부의 응력집중계수에 관한 연구,' 대한조선학회 논문집, 제 33권, 제 3호, pp. 1-7
  2. 강성원, 김영욱, 김화수, 김도현, 2001, 'Padding plate 용접구조의 인장 정하중 이력에 의한 용접잔류응력 변화 및 피로강도에의 영향,' 대한조선학회 논문집, 제 38권, 제 4호, pp. 75-82
  3. 김석훈, 강성원, 김명현, 장용원, 하우일, 박진수, 2004, '구조응력 및 핫스팟 응력을 이용한 용접구조물 피로수명 평가에 관한 연구,' 선박해양 구조연구회 연구발표 논문집, pp. 59-72
  4. 전유철, 김유일, 강중규, 한종만, 2001, '피로시험 및 균열진전 해석을 통한 용접부의 피로수명 예측에 관한 연구,' 대한조선학회 논문집, 제 38권, 제 3호, pp. 93-106
  5. Barsom, J.M. and Vecchio, R.S., 1997, 'Fatigue of Welded Structures,' WAC Bulletin 376
  6. Dong, P., 2001, 'A Structural Stress Definition and Numerical Implementation for Fatigue Evaluation of Welded Joints,' International Journal of Fatigue, Vol. 23/10, pp. 865-876
  7. Dong, P., 2003, Battelle Structural stress JIP Final Report, No. N004431-01
  8. Niemi, E., 1999, 'Structural Hot-Sport Stress Approacs to Fatigue Analysis of Welded Components-Designer's Guide,' III Doc.X III -1817-00, X V-1090-01, X III-WG3-06-99