Open Access
Table 1.
Target material model parameters for our impact simulations.
| Description | Boulders | Target matrix |
|---|---|---|
| Material | SiO2 | SiO2 |
| Equation of state (EOS) | Tillotson(a, b) | Tillotson(a, b) |
| Yield criterion | Tensile(c) | Drucker–Prager |
| Initial bulk modulus, A (GPa) | 35.9 | 35.9 |
| Drucker–Prager criterion | ||
| Cohesion, Y (Pa) | 107 | 0 |
| Strength at infinite pressure, Ym (GPa) | 1.0 | 0.1 |
| Internal friction coefficient, f | 0.8 | 0.56 |
| Porosity model (P − α)(d) | ||
| Initial distension, α0 | 1.55 | 1.55 |
| Solid pressure, Ps (MPa) | 40 | 20 |
| Elastic pressure, Pe (MPa) | 1 | 1 |
| Exponent, n | 2 | 2 |
References.
(a) Tillotson (1962); (b) Melosh (2007); (c) Jutzi (2015); (d) Jutzi et al. (2008).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.