Fatigue Behavior of Large Scale Tubular Joint for API 2W Gr. 50 Steel

J. Ocean Eng. Technol. 2005;19(3):54-58.

Im Sung-Woo,Chang In-Hwa,Jo Chul-Hee,Park Kwan-Kyu

Research Institute of Industrial Science and Technology,Research Institute of Industrial Science and Technology,Naval Architecture and Ocean Engineering In-Ha University,Naval Architecture and Ocean Engineering Major In-Ha University Graduate School

API 2W Gr.50 강재를 이용한 대형 Tubular Joint 피로성능평가

임성우,장인화,조철희,박관규

포항산업과학연구원(RIST),포항산업과학연구원(RIST),인하대학교 선박해양공학,인하대학교 대학원 선박공학과

Keywords: Tubular Joint, Fatigue Behavior, FEM

핵심용어: 관 연결, 피로 성능, 유한요소법

Abstract

Large-scale model tests of welded tubular K-joints were carried out to observe the fatigue behavior of API 2W Gr.50 steel produced by POSCO. The fatigue crack behaviors for various loading conditions were measured and investigated around the critical joint sections. The experimental results have been verified with numerical approaches and were also compared with the IIW, DnV RP-C203 and API RP 2A-WSD design curves. The hot-spot stress method was applied in the study. The SCF factor for tubular K-joint was also obtaine.