Table 1
Physical properties of target grains.
| Name | μ | ρg (kg m−3) | φ | Yg (kPa) |
|---|---|---|---|---|
| (a) Wet | 0.60 ± 0.02 | 600 ± 30 | 0.25 ± 0.01 | 5.5 ± 1.5 |
| (b) Dry | 0.67 ± 0.03 | 630 ± 30 | 0.26 ± 0.01 | 18 ± 7 |
| (c) S650C02h | 0.53 ± 0.02 | 660 ± 30 | 0.28 ± 0.01 | 92 ± 21 |
| (d) S650C64h | 0.73 ± 0.03 | 650 ± 60 | 0.27 ± 0.02 | (6.0 ± 3.7) × 102 |
| (e) S750C01h | 0.87 ± 0.03 | 700 ± 10 | 0.29 ± 0.01 | (3.5 ± 1.5) × 103 |
| (f) S850C01h | 0.88 ± 0.03 | 1390 ± 80 | 0.58 ± 0.03 | (3.9 ± 1.7) × 104 |
| (g) Glass beads | 0.45 ± 0.02 | 1500 ± 60 | 0.63 ± 0.03 | (1.5 ± 10.2) × 105 |
Notes. Wet and Dry correspond to grains without sintering. Wet grains are not dried at all. The label STTTCXXh indicates sintered grains at TTT °C for XX hours. μ, ρg, and φ are the friction coefficient measured by the angle of repose, the bulk density, and the packing fraction of the target granular layer, respectively. Yg denotes the strength of the agglomerated grains. Errors of μ indicate the measurement uncertainty and other errors indicate the standard deviation of multiple measurements.
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