Characterisation of rock aggregate breakage properties using realistic texture-based modelling

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	Characterisation of rock aggregate breakage properties using realistic texture-based modelling
	Liu HY; Lindqvist PA; Akesson U; Kou SQ(寇绍全); Lindqvist JE; Liu, HY
发表期刊	INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
	2012-07-01
卷号	36 期号:10 页码:1280-1302
ISSN	0363-9061
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.
关键词	Microstructural Modelling Micromechanical Modelling Microscopic Observation Image Analysis Rock Breakage Rock Aggregate Part i Fracture Failure Compression Heterogeneity
学科领域	岩体力学和土力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000305680500003
项目资助者	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.
课题组名称	职能与支撑部门
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46379
专题	职能与支撑部门
通讯作者	Liu, HY
推荐引用方式 GB/T 7714	Liu HY,Lindqvist PA,Akesson U,et al. 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	Liu HY,Lindqvist PA,Akesson U,Kou SQ,Lindqvist JE,&Liu, HY.(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	Liu HY,et al."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.

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