Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2005.10a
- /
- Pages.1033-1036
- /
- 2005
- /
- 2005-8446(pISSN)
The Effect of Surface Roughness on the Contact Fatigue Life
표면 거칠기가 접촉피로 수명에 미치는 영향
- Chu Hyo-Jun (Mecha. & Precision Eng Dept. PNU) ;
- Lee Sang-Don (Mecha. & Precision and Dept., PNU) ;
- Cho Yong-Joo (Mechanical Eng. Dept. PNU)
- Published : 2005.10.01
Abstract
The effect of surface roughness on the contact fatigue was investigated in this study. To accomplish this goal, contact analysis based on the influence functions and the rectangular patch solution was performed to obtain the subsurface stress. Mesoscopic multiaxial fatigue criterion is then applied to predict fatigue damage. Suitable counting method and damage rule were used to evaluate the fatigue life of random loading caused by rough surface. As a result of the analysis, relationship between the life and roughness as well as the creack initiation depth was revealed. Below the critical roughness, It is observed that the fatigue life has hardly changed and creack is initiated around the depth at which the maximum shear stress occurs. Different behavior, however, is observed in case that the roughness is above the critical value.