Research Article
Research on the Seam Formation Mechanism of Elliptical Bipolar Linear Directional Blasting Based on the SPH-FEM Coupling Method
Table 1
Parameters of JH constitutive model [
21].
| Parameters | | Unit | Value |
| Equation of state | | | | Reference density | | g/cm3 | 2.66 | Bulk modulus | | GPa | 25.70 | Polynomial EOS constant | | GPa | −4500.00 | Polynomial EOS constant | | GPa | 300000.00 | Johnson–Holmquist strength model | | | | Shear modulus | | GPa | 21.90 | Hugoniot elastic limit | HEL | GPa | 4.50 | Intact strength constant | | | 0.76 | Intact strength exponent | | | 0.62 | Strain rate constant | | | 0.005 | Fractured strength constant | | | 0.250 | Fractured strength exponent | | | 0.62 | Max. fractured strength ratio | | | 0.25 | Johnson–Holmquist failure model | | | | Hydrotensile limit | HTL | MPa | −54.00 | Damage constant | | | 0.005 | Damage constant | | | 0.70 | Bulking constant | | | 0.50 | Type of tensile failure | | | Hydro |
|
|