Table 12 Fracture toughness results calculated by finite element method of different models at micro scale.
Model size (μm) | Terminal type | ID | maximum support reaction Fmax (μN) | Displacement at the maximum support reaction U (μm) | Critical stress intensity factor KIC (MPa·μm1/2) | Critical J-integral JIC (MPa·μm) |
|---|---|---|---|---|---|---|
2.5 × 2.4 | C–Fe | 1 | 322.014 | 0.013 | 2199.338 | 20.613 |
Fe–Fe | 2 | 289.329 | 0.011 | 1976.101 | 16.446 | |
Fe–C | 3 | 314.945 | 0.012 | 2151.057 | 19.860 | |
C–C | 4 | 347.225 | 0.014 | 2371.527 | 23.908 | |
5 × 4.8 | C–Fe | 5 | 453.188 | 0.018 | 2188.671 | 20.467 |
Fe–Fe | 6 | 419.869 | 0.016 | 2027.757 | 17.354 | |
Fe–C | 7 | 444.103 | 0.017 | 2144.795 | 19.867 | |
C–C | 8 | 494.871 | 0.019 | 2389.979 | 23.996 | |
10 × 9.6 | C–Fe | 9 | 655.081 | 0.025 | 2237.083 | 21.487 |
Fe–Fe | 10 | 610.247 | 0.022 | 2083.977 | 18.273 | |
Fe–C | 11 | 643.184 | 0.025 | 2196.455 | 20.860 | |
C–C | 12 | 703.355 | 0.027 | 2401.938 | 24.822 |
