DOI QR코드

DOI QR Code

Study on the Fatigue Crack Initiation Life Under Spherical Contact

구 접촉하에서의 피로균열 시작수명에 관한 연구

Jo, Yong-Ju;Kim, Tae-Wan;Lee, Mun-Ju
조용주;김태완;이문주

  • Published : 2001.08.01

Abstract

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.

Keywords

Fatigue Wear;Contact Fatigue;Subsurface Stress;Rectangular Patch Solution;Dislocation Dipole Model;Crack Initiation life

References

  1. 조용주, 이문주, 구영필, 2000, '반 무한체 위의 사각조각 표면에 작용하는 접선하중에 의한 반 무한체내의 응력해석,' 대한기계학회논문집 A권, 제24권, 제4호, pp. 1032-1038
  2. Mura, T. and Nakasone, Y., 1990, 'A Theory of Fatigue Crack Initiation in Solids,' Journal of Applied Mechanics, Vol. 57, pp. 1-6
  3. Love, A.E.H., 1929, 'The Stress Produced in a Semi-Infinite Solid by Pressure on Part of the Boundary,' Proc. Roy. Soc. London, Vol. A228, pp. 377 https://doi.org/10.1098/rsta.1929.0009
  4. Hamilton, G.M., 1983, 'Explcit Equations for the Stress Beneath a Sliding Spherical Contact,' Proc. Instn. Mech. Engrs, Vol. 197C, pp. 53-59
  5. Hamilton, G.M. and Goodman, L.E., 1966, 'The Stress Field Created by a Circular Sliding Contact,' ASME Journal of Applied Mechanics, Vol. 33, pp. 371-376
  6. Zhou, R.S., Cheng, H.S. and Mura, T., 1989, 'Micropitting in Rolling and Sliding Contact Under Mixed Lubrication,' Journal of Tribology, Vol. 111, pp. 605-613
  7. 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
  8. Cho, Y. J., Koo, Y. P. and Kim, T. W., 2000, 'A New FFT Technique for the Analysis of Contact Pressure and Subsurface Stress in a Semi-Infinite Solid,' KSME International Journal, Vol. 14, No. 3, pp. 331-337