AN EXPERIMENTAL AND STATISTICAL INVESTIGATION OF SURFACE FATIGUE CRACK INITIATION AND GROWTH |
| |
| Authors: | Y. Ochi A. Ishii S. K. Sasaki |
| |
| Affiliation: | Department of Mechanical Engineering, University of Electro-Communications, 1-5-1, Chofugaoka, Chofu-City, Tokyo, 182, Japan |
| |
| Abstract: | ![]()
Surface fatigue crack studies were carried out and statistically analysed from rotating bend fatigue tests in the high cycle region for three metals, copper, stainless steel and mild steel with four ferrite grain sizes. Quantitative observations of the initiation and growth behavior, including coalescence of closely spaced cracks, are discussed and a limiting condition for coalescence is proposed. Statistical properties of initiation, propagation and propagation rate of surface cracks are examined and the effect of different metals and grain sizes is discussed. |
| |
| Keywords: | |
|
|
