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Classification of the tension model
| Tension model | Crack shape aspect ratio (a/c) | Crack size aspect ratio (a/t) | Model width Aspect ratio (c/b) | Tension load (KN) |
|---|---|---|---|---|
| A | 1.00 | 0.8 | 0.5 | 45 |
Input distribution for the four-point bending model aluminium alloy (Al 7075-T6)
| Variable | Distribution | Mean | Standard deviation |
|---|---|---|---|
| Initial crack length (ci) | Lognormal | 8.00 mm | 0.1 |
| Initial crack depth (ai) | Lognormal | 4.50 mm | 0.1 |
| Young’s modulus (E) | Lognormal | 71.7 GPa | 0.01 |
| PR | Deterministic | 0.33 | 0 |
| Tensile strength (yield) | Deterministic | 503 MPa | 0 |
| Fatigue power parameter (n) | Lognormal | 2.88 | 0.1 |
| Paris coefficient (C) | Lognormal | 2.29 × 10–10 | 4.01 × 10–10 |
| Critical SIF (KIC) | Deterministic | 29 MPa. | 0 |