| 任建喜.单轴压缩岩石蠕变损伤扩展细观机理CT实时试验[J].水利学报,2002,33(1):0010-0016 |
| 单轴压缩岩石蠕变损伤扩展细观机理CT实时试验 |
| CT real-time testing on meso-mechanism of creep damage propagation in rock under uniaxial compression |
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| DOI： |
| 中文关键词: 岩石蠕变 细观损伤 CT实时试验 损伤演化机理 |
| 英文关键词: creep meso-damage of rock CT real-time testing damage evolution law |
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| 摘要点击次数: 3871 |
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| 中文摘要: |
| 采用作者研制的CT(computerized tomography)机专用三轴加载试验设备，完成了单轴压缩荷载作用下岩石蠕变细观损伤演化CT实时试验。得到了岩石蠕变损伤演化全过程中从裂纹萌生、伸长、增宽、分叉、断裂到破坏等各个阶段清晰的CT图象。从CT数和CT图象的变化规律出发，对岩石蠕变损伤三阶段的扩展细观机制进行了分析，完成了裂纹宽度、长度随时间发展的变化规律的定量研究，给出了岩石蠕变细观损伤演化的初步规律。建议用CT数下降速度的概念来判断岩石蠕变损伤第3阶段的门槛值。试验结果表明，单轴压缩岩石蠕变CT试验的结果令人满意，CT机专用三轴加载设备的研制是成功的，这为岩石蠕变细观试验提供了一个创新的试验手段。 |
| 英文摘要: |
| The meso-mechanism of creep damage propagation in rock under uniaxial compression is experimentally studied using the computerized tomograhpy(CT) real-time testing facility developed by the authors. Clear images of the failure process, including micro-cracks initiation, crack development and bifurcation and fracture are attained. Based on the change of the CT value and CT image obtained from scanning test, the propagation law of the meso-damage in rock is deduced. The change law of crack width and length related to creeping time has been quantitatively analyzed. |
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