The Effect of Stress Amplitude on Multi-Axial High-Cycle Fatigue Failure under Constant Amplitude Loading
| Periodical | Key Engineering Materials (Volumes 417 - 418) |
|---|---|
| Main Theme | Advances in Fracture and Damage Mechanics VIII |
| Edited by | M.H Aliabadi, S. Abela, S. Baragetti, M. Guagliano and Han-Seung Lee |
| Pages | 877-880 |
| DOI | 10.4028/www.scientific.net/KEM.417-418.877 |
| Citation | Xin Hong Shi et al., 2009, Key Engineering Materials, 417-418, 877 |
| Online since | October, 2009 |
| Authors | Xin Hong Shi, Jian Yu Zhang, Rui Bao, Bin Jun Fei |
| Keywords | High-Cycle Fatigue, Multi-Axial Fatigue, Non-Proportional Loading, Proportional Loading, Stress Amplitude |
| Price | US$ 28,- |
Studies about the effect of stress characteristics on multi-axial high-cycle fatigue of metals are still insufficient. Up to now, little work about the effect of different ratio of stress amplitude has been done on multi-axial fatigue under the same equivalent stress. In this paper, the effect of ratio of stress amplitude, under the same Von-Mises equivalent stress is studied from theory and experiment. The results show that the main factor of multi-axial high-cycle fatigue failure is the maximum principal stress. For proportional loading, fatigue life raises when ratio of stress amplitude increase. The variety of fatigue life is not obvious when is larger than a certain value and its value closes to that of pure torsion. For non-proportional loading, when ratio of stress amplitude increases, fatigue life raise at first, then has an inflection point. The value of at the inflection point changes with phase difference and its value is 0.5 while phase angle is 90ยบ. Fatigue life of uniaxial tension was lower than that of pure torsion.
