IMECH-IR  > 流固耦合系统力学重点实验室
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.
Source PublicationSCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
2014
Volume57Issue:12Pages:2297-2308
ISSN1674-7348
AbstractA 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.
KeywordGranular Materials Rolling Resistance Dem Calibration Yade
Subject AreaPhysics
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000345148200016
Funding OrganizationThis 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.
DepartmentLMFS水环境流体力学(LEM)
Classification二类/Q3
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49447
Collection流固耦合系统力学重点实验室
Corresponding AuthorLi, 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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