Effects of short cracks on fatigue life calculations

Date

1996-01-01

Author

Kaynak, Cevdet
Baker, T.J.

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In this study, the potential impact of the short crack problem in En7A steel with a high content of elongated MnS inclusions has been observed. Experimental short crack data were compared first with the predicted S-N curves determined using long crack growth parameters and second with the calculated lives using only long crack data and using both short crack and long crack data. All these life predictions revealed that long crack data alone cannot be used in fatigue lifetime analyses that treat short crack growth, because they can all lead to dangerous over-predicted lives.

Subject Keywords

Short crack, Fatigue life

URI

https://hdl.handle.net/11511/39944

Journal

International Journal of Fatigue

DOI

https://doi.org/10.1016/0142-1123(95)00075-5

Collections

Department of Metallurgical and Materials Engineering, Article

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A comparison of short and long fatigue crack growth in steel Kaynak, Cevdet; Baker, T.J. (1996-01-01) In this study, the growth behaviour of short fatigue cracks in En7A steel with a high content of elongated MnS inclusions has been investigated by generating and evaluating short crack growth data for the six principal specimen orientations. The anomalous initiation and growth behaviour of short cracks was also compared with that of long crack data for the same material and loading conditions determined before. This comparison revealed the sub-threshold initiation and faster growth rate of short cracks comp...
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Citation Formats

C. Kaynak and T. J. Baker, “Effects of short cracks on fatigue life calculations,” International Journal of Fatigue, pp. 25–31, 1996, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39944.