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Observed speeds at which a daughter crack or a granddaughter crack nucleates and the limiting speeds for the harmonic, anharmonic, and mixed simulation cases
| Harmonic | Anharmonic | Mixed | |
|---|---|---|---|
| Daughter crack | 3.5 | 4.1 | 4.1 |
| Granddaughter | — | — | 10.35 |
| Limiting speed | 9.4 | 15 | 15 |
