Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Fatigue Behavior with Respect to Rolling and Residual Stress in Butt-welded Steel Plate

맞대기 용접 강판재에서 압연 및 잔류응력에 의한 피로거동

  • 이용복 (홍익대학교 기계.시스템디자인공학과) ;
  • 오병덕 (홍익대학교 대학원 기계공학과) ;
  • 김성엽 (홍익대학교 대학원 기계공학과)
  • Published : 2006.07.01
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Abstract

For the improvement of safety and endurance in welded steel structure, it is needed to consider welding residual stress distribution and rolling directional characteristics of materials. In this study, it was investigated experimentally about characteristics of fatigue crack propagation according to welding residual stress and rolling in FCAW(flux cored arc welding) butt-jointed steel plates. SS400 steel plates of 3mm thickness were selected and tested for this study. When the angles between tensile loading direction and rolling direction in welded materials are increased from $0^{\circ}\;to\;90^{\circ}$, their fatigue crack propagation rates are increased. These results are same as predicted increments of fatigue crack propagation rate when stress ratio is increased from 0 to 0.5. When the angles of rolling direction and welding direction to tensile loading direction are $0^{\circ}\;and\;90^{\circ}$ respectively, fatigue crack propagation rate in welded material is lowest.

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References

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