Open Access
Table 3
Design factors and their levels.
| Experiment no. | N | Sm (MPa) | Sa (MPa) | σIrs (MPa) |
|---|---|---|---|---|
| 1 | 1 | 30 | 20 | 110 |
| 2 | 1 | 60 | 40 | 135 |
| 3 | 1 | 90 | 60 | 150 |
| 4 | 2 | 30 | 20 | 135 |
| 5 | 2 | 60 | 40 | 150 |
| 6 | 2 | 90 | 60 | 110 |
| 7 | 4 | 30 | 40 | 110 |
| 8 | 4 | 60 | 60 | 135 |
| 9 | 4 | 90 | 20 | 150 |
| 10 | 8 | 30 | 60 | 150 |
| 11 | 8 | 60 | 20 | 110 |
| 12 | 8 | 90 | 40 | 135 |
| 13 | 16 | 30 | 40 | 150 |
| 14 | 16 | 60 | 60 | 110 |
| 15 | 16 | 90 | 20 | 135 |
| 16 | 32 | 30 | 60 | 135 |
| 17 | 32 | 60 | 20 | 150 |
| 18 | 32 | 90 | 40 | 110 |
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