Research Article
Investigation on the Crack Initiation of V-Shaped Notch Tip in Precision Cropping
Table 2
Parameters of 45 steel bars.
| Mechanical parameters | Values |
| Diameter /mm | 15 | Notch depth /mm | 1.5 | Corner radius /mm | 0.2 | Flare angle /° | 60 | Fracture toughness /MPa·m0.5 | 102.78 | Crack extension threshold /MPa·m0.5 | 8 | Tensile ultimate strength /MPa | 639 | Yield limit /MPa | 377 | Contraction of cross section area | 0.4 | Fracture ductility | 0.465 | Strain hardening coefficient | 0.179 | Elastic modulus /N·m−2 | | Extensibility | 22.02% |
|
|