摘要
利用作者已研制成功的ＣＴ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损伤ＣＴ实时细观试 验。给出了ＣＴ图像中裂纹宽度的估算方法，确定了应力损伤门槛值，对ＣＴ试验结果进行了定量分析，得到了单轴 压缩岩石损伤演化的初步规律。基于ＣＴ试验结果，对岩石应力－应变全过程曲线进行了分段，从工程应用出发，给出 了峰前分段岩石损伤演化方程及本构关系。理论分析结果与试验结果较吻合。
The computerized tomography (CT) real-in-time testing of rock meso-damage evolution law under uniaxial compression loading has been completed using the specified loading equipment corresponding to the CT machine developed by authors. The estimation method of microcrack width is given. The stress threshold value of damage is determined with the quantitative analysis on testing results. The preliminary results of rock meso-damage evolution law under uniaxial compression are obtained. Based on the CT testing results, the complete rock stress-strain process curve is divided into several segments. From the point of view of engineering application, the pre-peak 3-segment damage evolution equation and constitutive model of rock are given. The obtained theory results coincide well with the testing results.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2001年第4期425-431,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
冻土工程国家重点实验室项目(No.9802
No.2003)
国家自然科学基金(10072047)
陕西省教育厅专项基金(0
关键词
岩石细观损伤
损伤演化方程
本构关系
单轴压缩荷载
Chemical analysis
Compressive strength
Computerized tomography
Loads (forces)
Microcracks
Real time systems
Strain
Stress analysis
