By using the crack analogue model of rigid flat-ended contact, crack initiation in fretting fatigue is analyzed. The coefficient of friction at the edge of contact, which characterizes the asymptotic stress field, is considered as the primary controlling parameter in the process. Meanwhile, the maximum tangential stress criterion and the maximum shear stress criterion are used to predict opening-mode and shear-mode crack initiations, respectively. By examining the model prediction and comparing it with experimental observations, it is shown that the observed microcracks at the small angles to a fretting surface were nucleated in shear mode in the early stage of tests with a smooth initial surface, while the microcracks at the large angles were nucleated in opening mode in the later stage with a rough worn surface. This understanding may help to establish the sequential damage mechanisms in the complex process of fretting fatigue.
On Crack Initiation Mechanisms in Fretting Fatigue
Contributed by the Applied Mechanics Division of The American Society of Mechanical Engineers for publication in the ASME JOURNAL OF APPLIED MECHANICS. Manuscript received by the ASME Applied Mechanics Division, Sept. 7, 1999; final revision, May 9, 2000. Associate Editor: K. Ravi-Chandar. Discussion on the paper should be addressed to the Editor, Professor Lewis T. Wheeler, Department of Mechanical Engineering, University of Houston, Houston, TX 77204-4792, and will be accepted until four months after final publication of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Yang, B., and Mall, S. (May 9, 2000). "On Crack Initiation Mechanisms in Fretting Fatigue ." ASME. J. Appl. Mech. January 2001; 68(1): 76–80. https://doi.org/10.1115/1.1344901
Download citation file:
- Ris (Zotero)
- Reference Manager