Probabilistic Fatigue Checklist
A checklist for verifying a probabilistic fatigue analysis — S-N scatter, load uncertainty, life distribution and failure probability.
Checklist
- S-N scatter is characterised from test data
- Load uncertainty is modelled from operational data
- The fatigue-life distribution accounts for both S-N and load uncertainty
- The limit state is clearly defined (life vs design life)
- Cumulative damage is treated probabilistically for variable-amplitude loading
- Sensitivity identifies whether S-N scatter or load uncertainty dominates
- The failure probability is reported with confidence bounds