CAJ | 학술논문

设计基于扫描电镜(SEM)的岩石破裂全过程数字化细观损伤力学试验方案,实现了岩石破裂全过程的显微与宏观实时的数字化监测、控制、记录及分析的岩石力学试验.应用于四川锦屏大理岩预制裂纹试样中进行单轴压缩破坏全程的数字化试验,对微裂纹的萌生、生长及贯通过程进行数字化定量分析,得到试样在受荷过程中微裂纹的面积、方位角、长度、宽度和周长基本几何数据,从宏细观角度描述了岩石试样单轴压缩过程中的破坏机制,并分析得出试样单轴受压破坏过程中虽然微裂纹在某些区域集中,但在整个试样中微裂纹的统计分布依然是服从某一指数分布的这一结论.试验研究结果证明了该试验方案的科学性和先进性.
설계기우소묘전경(SEM)적암석파렬전과정수자화세관손상역학시험방안,실현료암석파렬전과정적현미여굉관실시적수자화감측、공제、기록급분석적암석역학시험.응용우사천금병대리암예제렬문시양중진행단축압축파배전정적수자화시험,대미렬문적맹생、생장급관통과정진행수자화정량분석,득도시양재수하과정중미렬문적면적、방위각、장도、관도화주장기본궤하수거,종굉세관각도묘술료암석시양단축압축과정중적파배궤제,병분석득출시양단축수압파배과정중수연미렬문재모사구역집중,단재정개시양중미렬문적통계분포의연시복종모일지수분포적저일결론.시험연구결과증명료해시험방안적과학성화선진성.
A new meso-mechanical testing scheme based on SEM is developed to cany out the experiment of microfracturing process of rocks. The image of microfracturing process of the specimen can be observed and recorded digitally. The microfracturing process of Jinping marble specimen in Sichuan province under uniaxial compression is recorded by using the testing scheme. Quantitatively investigated the propagation and coalescent of cracks at meso-scale with digital technology, the basic geometric information of rock microcracks such as area, angle, length, width, perimeter, are obtained from binary images after segmentation. The failure mechanism of specimen under uniaxial compression with the quantitative information is studied from macro/micro scopic perspective. The result shows that during the damage of the specimen the distribution of microcracks in the whole specimen are still subjected to exponential distribution with some microcracks concentrated in certain regions. The conclusion indicates that the testing scheme is applicable.