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Application of Fractal Geometry on the Static Growing Crack of STS316 CT Specimen with a Side Groove  

Yun, Yu-Seong (Department of Safety Engineering, Pukyong National University)
Kwon, Oh-Heon (Department of Safety Engineering, Pukyong National University)
Publication Information
Journal of the Korean Society of Safety / v.17, no.4, 2002 , pp. 38-44 More about this Journal
Abstract
The application of fractal concept provides an useful method in the study for the quantitative analysis of irregular variations like the fracture surfaces and crack profiles. Fractal curves have characteristics that represents a self-similarity based on the fractal dimension. The fractal dimensions were obtained by the box counting method. In this report, we obtained the nearly stable fractal dimensions of fracture crack profiles for STS316 with CT specimen as the crack advances and the relationships between crack length and fractal dimension. Moreover fractal fracture parameter that corresponds to J-R curve is shown by the relationships between fractal dimension and crack extension. From the results, we concluded that crack extension of high toughness material also shows the fractal characteristics, which can be used in order to evaluate the crack life precisely.
Keywords
self-similarity; fractal dimension; box counting method; J-R curve; crack life;
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