Characterisation of rock aggregate breakage properties using realistic texture-based modelling
文献类型：期刊论文
| 作者 | Kou SQ(寇绍全)
|
| 刊名 | INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
 |
| 出版日期 | 2012-07-01 |
| 卷号 | 36期号:10页码:1280-1302 |
| 通讯作者邮箱 | Hong.Liu@utas.edu.au |
| 关键词 | microstructural modelling micromechanical modelling microscopic observation image analysis rock breakage rock aggregate Part I Fracture Failure Compression Heterogeneity |
| ISSN号 | 0363-9061 |
| 产权排序 | [Liu, Hongyuan] Univ Tasmania, Sch Engn, Hobart, Tas 7001, Australia;[Lindqvist, Per-Arne] Lulea Univ Technol, Dept Appl Chem & Geosci, S-97187 Lulea, Sweden; [Akesson, Urban; Lindqvist, Jan-Eric] CBI Swedish Cement & Concrete Inst, S-50115 Boras, Sweden; [Kou, Shaoquan] Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Liu, HY |
| 合作状况 | 国际 |
| 中文摘要 | Realistic texture-based modelling methods, that is microstructural modelling and micromechanical modelling, are developed to simulate the rock aggregate breakage properties on the basis of the rock actual microstructure obtained using microscopic observations and image analysis. The breakage properties of three types of rocks, that is Avja, LEP and Vandle taken from three quarries in Sweden, in single aggregate breakage tests and in inter-aggregate breakage tests are then modelled using the proposed methods. The microstructural modelling directly integrates the microscopic observation, image analysis and numerical simulation together and provides a valuable tool to investigate the mechanical properties of rock aggregates on the basis of their microstructure properties. The micromechanical modelling takes the most important microstructure properties of rock aggregates into consideration and can model the major mechanical properties. Throughout this study, it is concluded that in general, the microstructure properties of rock aggregate work together to affect their mechanical properties, and it is difficult to correlate a single microstructure property with the mechanical properties of rock aggregates. In particular, for the three types of rock Avja, LEP and Vandle in this study, crack size distribution, grain size and grain perimeter (i.e. grain shape and spatial arrangement) show good correlations with the mechanical properties. The crack length and the grain size negatively affect the mechanical properties of Avja, LEP and Vandle, but the perimeter positively influences the mechanical properties. Besides, the modelled rock aggregate breakage properties in both single aggregate and inter-aggregate tests reveal that the aggregate microstructure, aggregate shape and loading conditions influence the breakage process of rock aggregate in service. For the rock aggregate with the same microstructure, the quadratic shape and good packing dramatically improve its mechanical properties. During services, the aggregate is easiest to be fragmented under point-to-point loading condition, and then in the sequence of multiple-point, point-to-plane and plane-to-plane loading conditions. |
| 学科主题 | 岩体力学和土力学 |
| 收录类别 | SCI ; EI |
| 资助信息 | The experimental and numerical studies in this investigation were mainly completed at Lulea University of Technology in Sweden, and the analytical work was accomplished at University of Tasmania in Australia. The financial supports from the Geological Survey of Sweden (SGU) and the NARGS and IRGS grants at the University of Tasmania are greatly appreciated. Moreover, the authors would like to thank Lars Persson at SGU for supporting our research work, making valuable comments and suggestion and providing a number of literatures. Besides, we are in debt to Mattias Goransson at SGU for the rock sampling and Lars Jacobsson at Swedish National Testing and Research Institute (SP) for the mechanical tests. |
| 原文出处 | http://dx.doi.org/10.1002/nag.1053 |
| 语种 | 英语 |
| WOS记录号 | WOS:000305680500003 |
| 公开日期 | 2013-01-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/46379]  |
| 专题 | 力学研究所_职能与支撑部门 |
| 推荐引用方式 GB/T 7714 | Kou SQ. Characterisation of rock aggregate breakage properties using realistic texture-based modelling[J]. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,2012,36(10):1280-1302. |
| APA | Kou SQ.(2012).Characterisation of rock aggregate breakage properties using realistic texture-based modelling.INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS,36(10),1280-1302. |
| MLA | Kou SQ."Characterisation of rock aggregate breakage properties using realistic texture-based modelling".INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS 36.10(2012):1280-1302. |
入库方式： OAI收割
来源：力学研究所
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