Distribution of Aspect Ratio of Fatigue Crack at Notch Root Depending on Crack Initiation Point of Annealed Steel, JIS S45C

Takahiro Matsueda; Masayuki Ishida; Koshiro Mizobe

doi:10.4028/www.scientific.net/MSF.893.240

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HomeMaterials Science ForumMaterials Science Forum Vol. 893Distribution of Aspect Ratio of Fatigue Crack at...

Distribution of Aspect Ratio of Fatigue Crack at Notch Root Depending on Crack Initiation Point of Annealed Steel, JIS S45C

Abstract:

Aspect ratio of crack is one of key factors of fatigue strength prediction in engineering design and civil structures using fracture mechanics. Their empirical shapes are changed by stress concentration. However, it was not clear how stress concentration affects empirical results including crack shape and size. In this study, in order to investigate the relationship between stress concentration and crack geometry, the aspect ratio of cracks at notch root was observed and discussed. We succeeded to capture two important relationships which are between stress concentration and crack shape, and between crack initiation point at notch root and crack shape, respectively.

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Periodical:

Materials Science Forum (Volume 893)

Pages:

240-244

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.893.240

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Online since:

March 2017

Authors:

Takahiro Matsueda*, Masayuki Ishida, Koshiro Mizobe

Keywords:

Aspect Ratio, Crack, Notch, Stress Concentration, Surface Crack Length

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