Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference (한국윤활학회:학술대회논문집)

Korean Tribology Society (한국트라이볼로지학회)
권호 표지

The contact fatigue life estimation between Rough surfaces by using mesoscopic fatigue criterion

Mesoscopic 피로이론을 이용한 거친 표면의 접촉피로 수명예측

  • Chu Hyojun (Preci. and Mech. Eng., Pusan National Univ.) ;
  • Kim Taewan (Research institute of Mech. Tech., Pusan National Univ.) ;
  • Lee Sangdon (Preci. and Mech. Eng., Pusan National Univ.) ;
  • Cho Youngjoo (School of Mech. Eng., Pusan National Univ.)
  • Published : 2004.11.01
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Abstract

Rough surfaces are taking into account to estimate the contact fatigue life. A computational methodology and the theoretical basis in this case is presented in this paper. Displacement solution technique by Cho and Love is applied to calculate the stress history beneath the surface subjected to loading. Mesoscopic multiaxial fatigue criterion is then applied to predict fatigue life. This fatigue criterion yields satisfactory results for non-proportional loading and can satisfactorily describe the physical mechanisms of crack initiation as well. As a result of analysis the relation between the life and the roughness as well as the most probable depth of the crack nucleation is discussed.

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