Research Article
The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens
Table 2
The results of the rock dynamic fracture tests under dynamic loading.
| | No. | (s) | Log time | Fracture toughness (MPa·m0.5) | Loading rate (MPa·m0.5s-1) | Loading rate log |
| | D-1 | 0.000092 | -4.0362 | 2.2916 | 24908.9586 | 4.3964 | | D-3 | 0.000100 | -4.0000 | 2.3858 | 23858.1967 | 4.3776 | | D-5 | 0.000103 | -3.9872 | 2.3188 | 22513.0907 | 4.3524 | | D-6 | 0.000101 | -3.9957 | 3.4986 | 34639.4462 | 4.5396 | | D-8 | 0.000102 | -3.9914 | 2.4494 | 24014.1115 | 4.3805 | | D-9 | 0.000089 | -4.0506 | 1.8268 | 20525.4466 | 4.3123 | | B-1 | 0.000044 | 1.64345 | 7.1655 | 162853.964 | 5.2117 | | B-2 | 0.000047 | 1.67209 | 3.0971 | 65896.6140 | 4.8188 | | B-3 | 0.000043 | 1.633468 | 6.1324 | 142614.663 | 5.1541 | | B-4 | 0.000050 | 1.69897 | 4.3066 | 86133.5032 | 4.9351 | | B-6 | 0.000072 | 1.85733 | 3.6652 | 50906.3257 | 4.7067 |
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