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首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Fatigue crack growth at stress concentrators under spectrum loading
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Fatigue crack growth at stress concentrators under spectrum loading

机译:频谱载荷下应力集中器的疲劳裂纹扩展

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Fatigue cracks initiate at stress raisers such as notches, discontinuities, and surface defects. Many of the field failures that indicate the presence of a fatigue crack at failure can be traced to crack initiation from one or more crack initiation sites and merger of cracks over a period of service. Substantial service life is spent in the growth of small cracks from an initial size of few micrometres before they coalesce and grow to critical dimensions that cause fracture. This paper summarizes research that was carried out in order to understand the kinetics of crack growth of small cracks at notches under simulated FALSTAFF service loading. This paper also presents a method used to understand crack growth kinetics in a pin-loaded lug joint through a crack-front-mapping technique.
机译:疲劳裂纹始于应力产生者,例如缺口,不连续和表面缺陷。指示失效时存在疲劳裂纹的许多现场失效可追溯到一个或多个裂纹萌生部位的裂纹萌生以及一段时间内的裂纹合并。细小裂纹的成长从最初的几微米大小开始,直到它们聚结并发展到导致破裂的临界尺寸,才具有相当长的使用寿命。本文总结了为了解在模拟FALSTAFF服务载荷下切口处小裂纹的裂纹扩展动力学而进行的研究。本文还提出了一种用于通过裂纹前沿映射技术了解销钉接缝中裂纹扩展动力学的方法。

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