基于CT扫描的花岗岩三维数值试件重构模型及应用

发布时间：2018-03-12 20:34

本文选题：花岗岩　切入点：CT　出处：《固体力学学报》2017年06期 　论文类型：期刊论文

【摘要】：岩石细观结构控制宏观破裂模式,建立一种表征岩石细观结构的数值模型重构方法并能够嵌入到力学模型中计算岩石破坏过程应力分布,对于揭示岩石破坏机理具有重要的理论意义.论文以花岗岩试件为研究对象,借助于先进的CT技术获取试件内部结构切片图像,利用数字图像处理技术实现了基于CT图像的花岗岩试件结构的识别和表征,基于矢量化方法和岩石破裂过程分析系统RFPA3D建立了花岗岩三维数值试件,对花岗岩试件单轴压缩破裂过程进行了数值模拟.通过数值试验结果与物理实验结果对比发现,基于CT扫描的花岗岩数值试件真实表征了岩石细观结构,所以力学模拟得到的破裂模式与室内物理实验得到的破裂模式相似,同时能够解译岩石破裂力学机理,为深入研究岩石、复合材料等力学特征提供了一种可行方法.
[Abstract]:The meso-structure of rock controls the macroscopic fracture model and establishes a numerical model reconstruction method which can be embedded in the mechanical model to calculate the stress distribution in the rock failure process. It is of great theoretical significance to reveal the mechanism of rock failure. In this paper, we take granite specimen as the research object and obtain the slice image of the internal structure of the specimen with the help of advanced CT technology. The recognition and characterization of granite specimen structure based on CT image are realized by using digital image processing technology. Based on the vectorization method and the rock fracture process analysis system (RFPA3D), the three-dimensional numerical specimens of granite are established. The uniaxial compression fracture process of granite specimen is simulated. By comparing the numerical results with the physical test results, it is found that the granite specimen based on CT scanning truly represents the meso-structure of the rock. Therefore, the fracture mode obtained by mechanical simulation is similar to that obtained by laboratory physical experiments, and it can interpret the mechanism of rock fracture mechanics, which provides a feasible method for further study of mechanical characteristics of rock and composite materials.
【作者单位】：东北大学资源与土木工程学院;
【基金】：国家自然科学基金项目(51474050,U1602232) 地质灾害防治与地质环境保护国家重点实验项目(SKLGP2014K011) 国家级大学生创新创业训练计划项目(201610145021)资助
【分类号】：TP391.41;TU45

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