한국안전학회지 (Journal of the Korean Society of Safety)

  • 제17권4호
  • /
  • Pages.38-44
  • /
  • 2002
  • /
  • 1738-3803(pISSN)
  • /
  • 2383-9953(eISSN)
한국안전학회 (The Korean Society of Safety)
권호 표지

측면 홈을 가지는 STS316 CT시험편의 정적 성장균열에 대한 프랙탈 기하학의 응용

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)
  • 발행 : 2002.12.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

참고문헌

  1. Benoit. B., Mandelbrot, 'The Fractal Geometry of Nature,' W. H. Freeman and Company, New York, 1983
  2. 류주환, '프랙탈과 고분자과학,' 고분자과학기술, Vol. 5, No. 5, pp.479-491, 1994
  3. Jiang, X. G., Cui, J. H. and Ma, L. X- 'A Fractal Model for Cavity Damage and Fracture of Materials during Superplastic Deformation,' Acta metall. mater., Vol. 40, No. 6, pp. 1267-1270, 1992 https://doi.org/10.1016/0956-7151(92)90426-F
  4. K. K Ray, and G., Mandal, 'Study of Correlation between Fractal Dimension and Impact Energy in a High Strength Low Alloy Steel,' Acta metall. mater., Vol. 40, No. 3, pp. 463-469, 1992 https://doi.org/10.1016/0956-7151(92)90394-T
  5. Z. H, Huang, J. F. Tian, and Z. G., Wang, 'A Study of the Slit Island Analysis as a Method for Measuring Fractal Dimension of Fractured Surface,' Scripta Metallurgica, Vol. 24, pp. 967-972, 1990 https://doi.org/10.1016/0956-716X(90)90284-N
  6. Takashi S., Tatuo A., and Akira U., 'フラクタル特性に基づく金屬疲勞破面性狀の破壞力學的考察' 日本機械學會論文集, 66卷, 2号, pp.2183-2190, 2000
  7. R. H., Dauskardt, F. Haubensak, and R. 0., Richie, 'On the Interpretation of the Fractal Character of Fracture Surfaces,' Acta metall. mater., Vol. 38, No. 2, pp. 143-159, 1990 https://doi.org/10.1016/0956-7151(90)90043-G
  8. Ervin E. Underwood, and Kingshuk Banerji, 'Fractals in Fractography,' Materials Science and Engineering, Vol. 80, pp. 1-14, 1986 https://doi.org/10.1016/0025-5416(86)90297-1
  9. 권오헌, '성장균열 형상에 대한 기초적 프랙탈특성연구,' 한국박용기관학회지, Vol. 22, No. 4,1998