Research Article
Coupling Effect of Strain Rate and Freeze-Thaw Temperature on Dynamic Mechanical Properties and Fractal Characteristic of Saturated Yellow Sandstone
Table 1
Experimental result of dynamic compressive mechanical behavior for yellow sandstone under different temperatures and strain rates.
| Number | Temperature (°C) | Strain rate (s-1) | Average value (s-1) | Dynamic compressive strength (MPa) | Peak strain (10-3) | Elastic modulus (GPa) | DE (J) |
| 1 | 25 | 72.51 | 74.22 | 70.41 | 5.02 | 34.42 | 30.13 | 2 | -5 | 74.57 | 67.16 | 6.70 | 23.48 | 27.81 | 3 | -10 | 76.00 | 61.83 | 7.84 | 13.46 | 24.77 | 4 | -15 | 73.87 | 53.55 | 8.55 | 9.13 | 23.52 | 5 | -20 | 75.02 | 44.97 | 10.40 | 7.97 | 24.20 | 6 | -30 | 73.95 | 36.39 | 11.72 | 3.68 | 20.19 |
| 1 | 25 | 92.35 | 91.64 | 76.49 | 6.61 | 35.36 | 48.64 | 2 | -5 | 91.58 | 73.68 | 8.16 | 17.46 | 43.55 | 3 | -10 | 91.10 | 66.20 | 9.14 | 11.91 | 38.93 | 4 | -15 | 92.47 | 62.92 | 10.36 | 5.69 | 34.00 | 5 | -20 | 91.93 | 56.84 | 11.91 | 4.83 | 34.45 | 6 | -30 | 90.41 | 47.49 | 15.50 | 3.08 | 30.69 |
| 1 | 25 | 116.94 | 118.22 | 90.94 | 6.61 | 23.92 | 72.22 | 2 | -5 | 118.27 | 85.67 | 8.70 | 21.56 | 61.74 | 3 | -10 | 119.33 | 82.46 | 10.26 | 17.71 | 54.54 | 4 | -15 | 118.93 | 74.85 | 12.44 | 9.45 | 49.74 | 5 | -20 | 117.86 | 70.76 | 13.57 | 7.63 | 46.08 | 6 | -30 | 117.99 | 60.23 | 17.30 | 6.42 | 44.74 |
| 1 | 25 | 168.43 | 169.41 | 92.42 | 8.61 | 23.46 | 85.47 | 2 | -5 | 169.35 | 90.38 | 11.04 | 12.48 | 82.66 | 3 | -10 | 170.39 | 86.30 | 12.09 | 10.33 | 78.87 | 4 | -15 | 169.47 | 82.22 | 14.00 | 8.82 | 66.74 | 5 | -20 | 168.98 | 76.09 | 15.57 | 8.53 | 63.41 | 6 | -30 | 169.84 | 65.02 | 19.57 | 7.70 | 54.23 |
|
|