| Simulation of triaxial response of granular materials by modified DEM | |
Wang XL(王晓亮) ; Li JC(李家春); Li, JC (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Syst, Beijing 100190, Peoples R China.
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| Source Publication | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
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| 2014 | |
| Volume | 57Issue:12Pages:2297-2308 |
| ISSN | 1674-7348 |
| Abstract | A modified discrete element method (DEM) with rolling effect taken into consideration is developed to examine macroscopic behavior of granular materials in this study. Dimensional analysis is firstly performed to establish the relationship between macroscopic mechanical behavior, mesoscale contact parameters at particle level and external loading rate. It is found that only four dimensionless parameters may govern the macroscopic mechanical behavior in bulk. The numerical triaxial apparatus was used to study their influence on the mechanical behavior of granular materials. The parametric study indicates that Poisson's ratio only varies with stiffness ratio, while Young's modulus is proportional to contact modulus and grows with stiffness ratio, both of which agree with the micromechanical model. The peak friction angle is dependent on both inter-particle friction angle and rolling resistance. The dilatancy angle relies on inter-particle friction angle if rolling stiffness coefficient is sufficiently large. Finally, we have recommended a calibration procedure for cohesionless soil, which was at once applied to the simulation of Chende sand using a series of triaxial compression tests. The responses of DEM model are shown in quantitative agreement with experiments. In addition, stress-strain response of triaxial extension was also obtained by numerical triaxial extension tests. |
| Keyword | Granular Materials Rolling Resistance Dem Calibration Yade |
| Subject Area | Physics |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000345148200016 |
| Funding Organization | This work was supported by the National Natural Science Foundation of China (Grant Nos. 11432015 and 10932012). The first author also wants to acknowledge Chareyre et al. for the discussion on mechanics of granular materials on YADE launchpad. We also wish to thank the reviewers for their kind comments and suggestions. |
| Department | LMFS水环境流体力学(LEM) |
| Classification | 二类/Q3 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/49447 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Li, JC (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Syst, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Wang XL,Li JC,Li, JC . Simulation of triaxial response of granular materials by modified DEM[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57,12,:2297-2308. |
| APA | 王晓亮,李家春,&Li, JC .(2014).Simulation of triaxial response of granular materials by modified DEM.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(12),2297-2308. |
| MLA | 王晓亮,et al."Simulation of triaxial response of granular materials by modified DEM".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.12(2014):2297-2308. |
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