超高周疲劳的影响因素及疲劳机理的研究进展
发布时间：2019-04-21 14:41
【摘要】：超高周疲劳的研究可以满足某些特殊零部件极高循环周次的要求。综述了近年来超高周疲劳的研究进展,从S-N曲线的特征、断面上的鱼眼形貌以及裂纹的萌生与扩展特征等方面介绍了超高周疲劳的典型特征。分析了影响超高周疲劳的若干因素,如氢的作用、加载频率、应力比和晶粒尺寸等。进而提出了一些今后超高周疲劳的研究方向:超高周疲劳裂纹扩展的微观机理、扩展速率尤其是微观、宏观上的控制参量的研究以及确定鱼眼与ODA区边缘的应力强度因子范围对内部裂纹扩展门槛值的影响作用。
[Abstract]:The research on super-high cycle fatigue can meet the requirements of very high cycle cycles for some special parts. The research progress of ultra-high cycle fatigue in recent years is reviewed. The typical characteristics of super-high cycle fatigue are introduced from the characteristics of S-N curve, the shape of fish eye on the cross-section and the characteristics of crack initiation and propagation. Some factors affecting ultra-high cycle fatigue, such as the effect of hydrogen, loading frequency, stress ratio and grain size, are analyzed. Furthermore, some research directions of ultra-high cycle fatigue in the future are put forward: the micro-mechanism of crack growth, especially the growth rate of super-high-cycle fatigue crack, especially the micro-cycle fatigue crack growth rate. The macro-control parameters and the influence of the stress intensity factor range on the internal crack growth threshold of the fish eye and the edge of the ODA region were determined.
【作者单位】： 河北工业大学材料科学与工程学院;装甲兵工程学院装备再制造技术国防科技重点实验室;
【基金】：国家自然科学基金重点项目(51535011) 国防973计划(61328304)
【分类号】：TG113.255
[Abstract]:The research on super-high cycle fatigue can meet the requirements of very high cycle cycles for some special parts. The research progress of ultra-high cycle fatigue in recent years is reviewed. The typical characteristics of super-high cycle fatigue are introduced from the characteristics of S-N curve, the shape of fish eye on the cross-section and the characteristics of crack initiation and propagation. Some factors affecting ultra-high cycle fatigue, such as the effect of hydrogen, loading frequency, stress ratio and grain size, are analyzed. Furthermore, some research directions of ultra-high cycle fatigue in the future are put forward: the micro-mechanism of crack growth, especially the growth rate of super-high-cycle fatigue crack, especially the micro-cycle fatigue crack growth rate. The macro-control parameters and the influence of the stress intensity factor range on the internal crack growth threshold of the fish eye and the edge of the ODA region were determined.
【作者单位】： 河北工业大学材料科学与工程学院;装甲兵工程学院装备再制造技术国防科技重点实验室;
【基金】：国家自然科学基金重点项目(51535011) 国防973计划(61328304)
【分类号】：TG113.255
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