| 基于CT试验的岩石细观孔隙模型重构与并行模拟 |
| |
| 引用本文： | 郎颖娴,梁正召,段东,曹志林.基于CT试验的岩石细观孔隙模型重构与并行模拟[J].岩土力学,2019,40(3):1204-1212. |
| |
| 作者姓名： | 郎颖娴 梁正召 段东 曹志林 |
| |
| 作者单位： | 1. 大连理工大学 海岸和近海工程国家重点实验室，辽宁 大连 116024；2. 大连理工大学 岩石破裂与失稳研究中心，辽宁 大连 116024；
3. 太原理工大学 矿业工程学院，山西 太原 030024 |
| |
| 基金项目： | 国家重点研发计划（No.2016YFB0201000）；国家自然科学基金（No.51779031）。 |
| |
| 摘 要： |
|
| 关 键 词： | CT 数字图像处理 玄武岩 数值模拟 孔隙 |
| 收稿时间： | 2017-08-21 |
Three-dimensional parallel numerical simulation of porous rocks based on CT technology and digital image processing |
| |
| LANG Ying-xian,LIANG Zheng-zhao,DUAN Dong,CAO Zhi-lin.Three-dimensional parallel numerical simulation of porous rocks based on CT technology and digital image processing[J].Rock and Soil Mechanics,2019,40(3):1204-1212. |
| |
| Authors: | LANG Ying-xian LIANG Zheng-zhao DUAN Dong CAO Zhi-lin |
| |
| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China; 2. Center of Rock Instability and Seismicity Research, Dalian University of Technology, Dalian, Liaoning 116024, China; 3. College of Mining Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China |
| |
| Abstract: | Due to the heterogeneity, opacity and porosity of rock, it is difficult to truly represent three-dimensional internal meso-structure of rock through physical experiments and numerical simulations. In this study, a 3D non-uniform numerical method was proposed to simulate the porous rock failure based on the parallel finite element method. The CT technology was used to scan the rock specimens and obtain the picture layers. The edge detection algorithm, filtering algorithm and 3D matrix mapping method were applied to process the scanned pictures and reconstruct the Brazilian disk finite element model of the rock. Thus, 3D numerical Brazilian disk models were constructed, and the influence of the porosity and pore distribution were analyzed numerically. The results indicated that the pore distribution and porosity had significant effects on the crack propagation and tensile strength. The number of the secondary cracks decreased when the porosity was smaller and pores were sparse, while the number of the secondary cracks increased when the porosity increased. The different porosities of numerical specimens were calculated by using the digital image processing method, and the relationship between the tensile strength and porosity followed an exponential function. The porosity of the specimen was obtained by the digital image processing technology, and the law of porosity and tensile strength was exponentially distributed. The median filtering algorithm improved the accuracy of the digital model in the image processing, and the 3D numerical simulation model reflected the 3D meso-structure of rock-like porous materials, which provided an effective method for studying the mechanical behavior of rock. |
| |
| Keywords: | CT digital image processing basalt numerical simulation pore |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
