Research Article
Estimation of Fracture Toughness by Testing Notched Fracture Specimens and Applying the Theory of Critical Distances
Table 1
Average apparent fracture toughness obtained for the different materials and notch radii [
6,
7].
| Material | Notch radius ρ (mm) | (MPam1/2) | Material | Notch radius ρ (mm) | (MPam1/2) |
| PMMA | ≈0 | 2.04 | Al7075 (LT) | ≈0 | 27.01 | 0.25 | 2.43 | 0.15 | 55.78 | 0.32 | 2.35 | 0.21 | 65.73 | 0.5 | 2.71 | 0.47 | 83.98 | 1.0 | 4.41 | 1.0 | 99.43 | 1.5 | 4.25 | 2.0 | 107.58 | 2.0 | 5.38 | 2.5 | 5.36 |
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