Research Article
Microscopic Investigation of Rate Dependence on Three-Point Notched-Tip Bending Sandstone
Table 2
Crack initiation loads of specimens with different loading rates obtained from AE results and microscopic visualization monitoring system.
| | Specimen no. | AE monitoring | Microscopic monitoring | | Experiment (%) | Average (%) | Experiment (%) | Average (%) |
| | TPB-0.6-1 | 79.4 | 79.3 | 64.2 | 71.3 | | TPB-0.6-2 | 76.3 | 70.5 | | TPB-0.6-3 | 82.3 | 79.1 | | TPB-1.0-1 | 91.1 | 88.0 | 69.3 | 72.7 | | TPB-1.0-2 | 87.5 | 75.1 | | TPB-1.0-3 | 85.4 | 73.6 | | TPB-1.4-1 | 90.6 | 90.4 | 74.8 | 74.2 | | TPB-1.4-2 | 88.8 | 71.6 | | TPB-1.4-3 | 91.8 | 76.2 | | TPB-1.8-1 | 85.2 | 90.0 | 81.2 | 77.6 | | TPB-1.8-2 | 89.9 | 76.4 | | TPB-1.8-3 | 91.8 | 75.3 | | TPB-3.0-1 | 92.5 | 92.1 | 79.8 | 78.5 | | TPB-3.0-2 | 93.2 | 80.6 | | TPB-3.0-3 | 90.5 | 75.2 |
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