在现代工业中，许多钢结构被要求承受108以上的疲劳载荷，钢的超高周疲劳性能研究已成为疲劳研究领域的一大热点。对当前国内外钢的超高周疲劳性能及其影响因素研究进行了综述，主要介绍了超高周疲劳S-N曲线、超高周疲劳裂纹萌生和扩展机理以及几个超高周疲劳性能影响因素，并提出了以后在超高周疲劳问题研究中需要进一步研究的方向，为当前超高周疲劳研究提供一个参考。
In the modern industry,many steel structures are required to bear the fatigue load more than 108 cycles,so the research of ultra-long-life fatigue properties of steel has become a hot-spot in the research of the fatigue field. The re-search status and progress on fatigue properties of steel in ultra-long-life regime and its influencing factors are reviewed in this paper,which mainly introduced the S-N curves,the mechanism of crack initiation and propagation,and several impact factors of ultra-long-life fatigue of steel. Besides,several points which need further research on ultra-long-life fa-tigue of steel are put forward to provide a reference for the current research.
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