대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제30권12호
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  • Pages.1573-1580
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  • 2006
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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구상흑연주철 극저사이클 피로파괴의 시뮬레이션 구현

Simulation of Extremely Low Cycle Fatigue Fracture in Ductile Cast Iron

  • 김민건 (강원대학교 기계메카트로닉스공학부) ;
  • 임복규 ((재)울산산업진흥테크노파크 자동차부품혁신센터)
  • 발행 : 2006.12.01
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초록

In this study, fatigue tests were carried out under push-pull loading condition using spheroidal graphite cast iron in order to clarify the internal fatigue fracture mechanism in an extremely low cycle fatigue regime. It is found that a successive observation of internal fatigue damage it is found that the fracture processes go through three stages, that is, the generation, growth and coalescence of microvoids originated from debonding of graphite-matrix interface. It is also found that the crack which is initiated from the void propagates by coalescence of neighboring cracks and the fatigue crack growth rate can be expressed in form of the Manson-Coffin rule type. In this paper, quantitative analyses of fatigue properties for realization of simulation about fatigue life evaluation are also presented.

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참고문헌

  1. Steven R. Lampman., 1996, 'Fatigue and Fracture Properties of Cast Irons,' ASM Handbook, Vol. 19, pp. 665-679
  2. Masatoshi Kuroda., 2002, 'Extremely Low ？Cycle Fatigue Life Prediction Based on a New Cumulative Fatigue Damage Model,' International Journal of Fatigue, Vol. 24, No. 6, pp. 699-703 https://doi.org/10.1016/S0142-1123(01)00170-0
  3. Yonekura, D., Aral, Y, Komotori, J. and Shimizu, M., 1999, 'Fracture Mechanism of Ferritic Ductile Cast Iron in Extremely Low Cycle Fatigue,' Trans. of JSME(A), Vol. 65, No. 632 pp. 821-826 https://doi.org/10.1299/kikaia.65.821
  4. Shimada, K., Komotori, J. and Shimizu, M., 1987, 'The Applicability of the Manson-Coffin Law and Miner's Law to Extremely Low Cycle ？Fatigue,' Trans. Jpn. Soc. Mech. Eng. (A), Vol. 53, pp. 1178-1185 https://doi.org/10.1299/kikaia.53.1178
  5. Kim, M. G, Lee, B. H, Yoo, B. H. and Kim, H. Y., 1999, 'The Fatigue Life Prediction by Internal Fatigue Damage under Extremely Low Cycle Loading,' Trans. of KSME(A), Vol 23, No 12, pp. 2328-2333
  6. Kim, M. G. and Kim, J. H., 1999, 'Influence of Matrix Structural and Mechanical Factors on Fatigue Limit in Austempered Ductile Iron,' Trans. of KSME (A), Vol. 23, No.2, pp. 287-293