Modified Method to Predict Fatigue Crack Shape Based on Empirical Observation

Takahiro Matsueda; Tatsurou Nakashima

doi:10.4028/www.scientific.net/KEM.748.396

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 748Modified Method to Predict Fatigue Crack Shape...

Modified Method to Predict Fatigue Crack Shape Based on Empirical Observation

Abstract:

Aspect ratio of crack is one of key factors of fatigue strength prediction in engineering design and civil structures using fracture mechanics and nondestructive inspection. However the author proposed the method to predict crack shape, it has the error caused by stress distribution of notch. In this study, in order to investigate the relationship between predicted crack shape and empirical observed it, the aspect ratio of cracks at notch root was observed, analyzed and discussed. We obtained the two important conclusions which are between predicted crack shape and empirical observed it. Predicted aspect ratio of crack was 17% bigger than that of observation result. The aspect ratio of crack should be defined considering scale of crack and notch shape.

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Advanced Materials and Engineering Materials VI

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Periodical:

Key Engineering Materials (Volume 748)

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396-399

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.748.396

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Online since:

August 2017

Authors:

Takahiro Matsueda*, Tatsurou Nakashima

Keywords:

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

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