This paper introduces the process and result of fatigue test of steel (Z direction steel) welded T tubular joints used in offshore engineering. Detailed measurement of stress concentration factor, stress distribution,...This paper introduces the process and result of fatigue test of steel (Z direction steel) welded T tubular joints used in offshore engineering. Detailed measurement of stress concentration factor, stress distribution, fatigue life and crack development has been performed. Through analysis, an empirical formula of stress concentration factor for T tubular joints, fatigue S-N curve and crack propagation rule are obtained.展开更多
为满足某大型海洋平台模块钢结构焊接的需要,采用SMAW和SAW焊接工艺对S420MLO材料进行焊接试验和力学性能试验。在试验过程中,通过裂纹尖端张开位移(Crack Tip Opening Displacement,CTOD)试验进行焊接工艺评定。试验结果表明,在焊材选...为满足某大型海洋平台模块钢结构焊接的需要,采用SMAW和SAW焊接工艺对S420MLO材料进行焊接试验和力学性能试验。在试验过程中,通过裂纹尖端张开位移(Crack Tip Opening Displacement,CTOD)试验进行焊接工艺评定。试验结果表明,在焊材选用合理、焊接工艺得到严格控制的情况下,通过焊前预热和焊后消氢处理,能获得良好的焊接接头性能,满足相关标准及项目文件的要求,避免对大型钢结构进行焊后热处理。展开更多
文摘This paper introduces the process and result of fatigue test of steel (Z direction steel) welded T tubular joints used in offshore engineering. Detailed measurement of stress concentration factor, stress distribution, fatigue life and crack development has been performed. Through analysis, an empirical formula of stress concentration factor for T tubular joints, fatigue S-N curve and crack propagation rule are obtained.
文摘为满足某大型海洋平台模块钢结构焊接的需要,采用SMAW和SAW焊接工艺对S420MLO材料进行焊接试验和力学性能试验。在试验过程中,通过裂纹尖端张开位移(Crack Tip Opening Displacement,CTOD)试验进行焊接工艺评定。试验结果表明,在焊材选用合理、焊接工艺得到严格控制的情况下,通过焊前预热和焊后消氢处理,能获得良好的焊接接头性能,满足相关标准及项目文件的要求,避免对大型钢结构进行焊后热处理。