不同热冲击过程花岗岩I型和Ⅱ型断裂特性研究
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范晓冬,李响,陶明,尹土兵,李夕兵
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Study on Mode Ⅰ and Mode Ⅱ Fracture Characteristics of Granite Under Different Thermal Shock Process
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Xiaodong FAN,Xiang LI,Ming TAO,Tubing YIN,Xibing LI
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表1 不同程度热冲击后花岗岩物理力学性质
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Table 1 Physical and mechanical properties of granite after different degrees of thermal shock
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试样温度/℃ | 制冷液温度/℃ | 干密度/(kg·m-3) | 孔隙率/% | 纵波波速/(m·s-1) | Ⅰ型断裂韧度/(MPa·m0.5) | Ⅱ型断裂韧度/(MPa·m0.5) |
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25 | - | 2 638.14 | 0.664 | 4 272.88 | - | - | 200 | -20 | 2 634.38 | 0.696 | 4 059.68 | 0.973 | 1.418 | 20 | 2 638.09 | 0.656 | 4 331.96 | 1.020 | 1.438 | 60 | 2 642.63 | 0.603 | 4 557.40 | 1.070 | 1.449 | 400 | -20 | 2 616.87 | 1.313 | 2 802.47 | 0.404 | 0.586 | 20 | 2 621.39 | 1.288 | 2 877.78 | 0.424 | 0.709 | 60 | 2 625.66 | 1.268 | 2 935.61 | 0.451 | 0.772 | 600 | -20 | 2 547.11 | 3.776 | 1 461.49 | 0.074 | 0.159 | 20 | 2 549.22 | 3.752 | 1 481.30 | 0.080 | 0.160 | 60 | 2 552.39 | 3.735 | 1 504.76 | 0.086 | 0.161 |
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