Fatigue Strength Evaluation of Welded Box Type with HR Coil

HR Coil재 Box형 용접구조물의 피로강도평가에 관한 연구

  • Kang, Sung-Won (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Myung-Hyun (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Jang, Yong-Won (Dept. of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Lee, Jin-Woo (R&D team, Volvo Construction Equipment Korea Ltd.,)
  • 강성원 (부산대학교 조선해양공학과) ;
  • 김명현 (부산대학교 조선해양공학과) ;
  • 장용원 (부산대학교 조선해양공학과) ;
  • 이진우 (볼보건설기계코리아㈜ 연구소)
  • Published : 2005.10.01

Abstract

Due to the difficulties associated with the supply of steel plates, hot rolled coil (Steel grade: SM490A) is considered fur structural materials in replace of the existing SWS50A-M1. However, it is found that SM490A exhibits a significant anisotropy in terms of impact energy with respect to transverse and longitudinal directions. In this study, an experimental investigation is carried out to examine the relationship between the anisotropy in impact values and the fatigue strengths of SM490A with respect to the rolling direction of test specimens. All test specimens failed around 1,500,000 cycles regardless of the test specimen direction. Therefore, it is found that the anisotropy in impact energy is not related to the fatigue strength of the materials considered in this study. However, the transverse direction specimen showed more rapid brittle fracture mode compared to that of longitudinal direction specimen, and this appears to be related to the lower impact values in transverse direction.

Keywords

References

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