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

  • 제25권8호
  • /
  • Pages.1269-1276
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  • 2001
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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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구 접촉하에서의 피로균열 시작수명에 관한 연구

Study on the Fatigue Crack Initiation Life Under Spherical Contact

  • Jo, Yong-Ju (Dept.of Mechanical Engineering, Busan National University) ;
  • Kim, Tae-Wan (Dept.of Precision Mechanical Engineering, Graduate School of Busan National University) ;
  • Lee, Mun-Ju
  • 발행 : 2001.08.01
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초록

In case of contact fatigue, the accurate calculation of surface tractions and subsurface stress is essential to the predication of crack initiation life. Surface tractions influencing shear stress amplitude have been obtained by contact analysis based on influence function. Subsurface stress has been obtained by using rectangular patch solutions. In this study, to simulate asperity contact under sliding condition, the tip of asperity was simulated by sphere and to calculate crack initiation life in the substrate, dislocation pileup theory was used.

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참고문헌

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  2. Cheng, W., Cheng, H.S., Mura, T. and Keer, L.M., 1994, 'Micro-Mechanics Modeling of Crack Initiation Under Contact Fatigue,' Journal of Tribology, Vol. 116, pp. 2-8
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  8. Mura, T. and Nakasone, Y., 1990, 'A Theory of Fatigue Crack Initiation in Solids,' Journal of Applied Mechanics, Vol. 57, pp. 1-6