Transactions of Nanjing University of Aeronautics & Astronautics
Probabilistic Tolerance Method for Omitting Small Fatigue Loads
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
The simplification of fatigue load spectrum， which can effectively reduce experimental cost， is of great importance for structural fatigue tests. By introducing random variables， the probabilistic tolerance method of removing small amplitude cycles proposed in this paper takes into account the randomness of both load and fatigue limit. The probability of the damage occurrence caused by the removed small loads is calculated to ensure that it cannot exceed the given probabilistic tolerance. Accordingly， the omission level is obtained and the truncated spectrum is formed. The unnotched aluminum sheet specimens are used to perform the fatigue test on the original fatigue spectrum and truncated fatigue spectrum of a transporter. The test results show that there is no statistical difference between the test life of the truncated spectrum and that of the original spectrum， which demonstrates the validity of the small-load-omitting method that considers randomness.
Keywords:
Project Supported:
Clc Number:
V216.3
Mobile website
