Short fatigue crack behaviour of LZ50 railway axle steel under multi-axial loading in low-cycle fatigue
作者: Zhen LiaoBing YangYahang QinShoune XiaoGuangwu YangTao ZhuNing Gao
作者单位: 1State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, China
2CRRC Tangshan Co. Ltd., Tangshan, China
刊名: International Journal of Fatigue, 2020, Vol.132
来源数据库: Elsevier Journal
DOI: 10.1016/j.ijfatigue.2019.105366
关键词: Low-cycle fatigueShort fatigue crackMultiaxial loadingCyclic J -integral modelCrack closureLZ50 steel
英文摘要: Abstract(#br)An experimental study was carried out on the low-cycle fatigue of LZ50 railway axle steel under multi-axial loading. The initiation and propagation behaviour of a short fatigue crack was observed and analysed as per the principles of effective short fatigue crack. Our results showed that in the microstructurally short crack (MSC) stage, the crack propagation was strongly influenced by the microstructural features of the material and did not satisfy the linear elastic fracture mechanics. At the physically short crack (PSC) stage, the crack was long enough to not be directly influenced by the microstructures; nevertheless, linear elastic fracture mechanics still could not explain the law of crack propagation properly owing to the large-scale yield range of the crack tip. Based...
全文获取路径: Elsevier  (合作)
影响因子:1.976 (2012)

  • fatigue 疲劳
  • steel 
  • railway 铁道
  • loading 加负载
  • behaviour 性质
  • crack 裂隙
  • axial 轴的
  • cycle 旋回
  • closure 闭合
  • integral 积分