中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院页岩气与地质工程重点实验室
Significance of the van der Waals force on the formation of the microstructure of wind-blown loess: An investigation using modified Discontinuous Deformation Analysis

文献类型：期刊论文

作者Li, Qiang3,4; Li, Tonglu3,4; Shen, Wei3,4; Li, Hua2; Li, Ping3,4; Li, Yan3,4; Hou, Xiaokun1
刊名COMPUTERS AND GEOTECHNICS
出版日期2022-08-01
卷号148页码:13
关键词Soil microstructure Loess Interparticle force van der Waals force Discontinuous Deformation Analysis
ISSN号0266-352X
DOI10.1016/j.compgeo.2022.104833
英文摘要The van der Waals force is significant for the formation of microstructures of wind-blown deposits, such as loess soil. However, it is difficult to observe the effect of the van der Waals force in the natural environment and laboratory. The conventional DDA model, which simplifies contact as compressed elastic springs, has been successfully applied in simulating blocky rock behaviors, but it is incapable of simulating tension forces. In this paper, we modified the conventional DDA model by considering blocks as soil particles and by applying the van der Waals force among the particles to investigate the micro-behavior of fine soil. The modified DDA is validated by simulating two ideal experiments. Then, the falling process of fine grains (<65 mu m), similar to wind-blown dust, is simulated by the modified and conventional DDA models separately. The simulated deposits of the falling grains by the two models show significant differences in microstructure. The microstructure generated by the modified DDA model is much closer to the loose structure of a real loess specimens, while that generated by the conventional DDA model is much more compact. This verifies that the van der Waals force is crucial for the formation of the loose microstructure of loess.
WOS关键词AGGREGATE STABILITY ; MODEL ; SIMULATION ; DDA ; EVOLUTION ; COLLAPSE ; PACKING ; SURFACE
资助项目National Natural Science Foundation of China[41790442] ; National Natural Science Foundation of China[41772278] ; China Scholarship Council (CSC)[202106560023]
WOS研究方向Computer Science ; Engineering ; Geology
语种英语
WOS记录号WOS:000809236500004
出版者ELSEVIER SCI LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council (CSC) ; China Scholarship Council (CSC) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council (CSC) ; China Scholarship Council (CSC)
源URL[http://ir.iggcas.ac.cn/handle/132A11/106093]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Shen, Wei
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
2.Engn Univ Peoples Armed Police, Sch Equipment Management & Supportabil, Xi'an 710086, Shaanxi, Peoples R China
3.Minist Educ, Water Cycle & Geol Environm Observat & Res Stn Chi, Zhengning 745399, Gansu, Peoples R China
4.Changan Univ, Sch Geol Engn & Geomatics, Xi'an 710054, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Li, Qiang,Li, Tonglu,Shen, Wei,et al. Significance of the van der Waals force on the formation of the microstructure of wind-blown loess: An investigation using modified Discontinuous Deformation Analysis[J]. COMPUTERS AND GEOTECHNICS,2022,148:13.
APA Li, Qiang.,Li, Tonglu.,Shen, Wei.,Li, Hua.,Li, Ping.,...&Hou, Xiaokun.(2022).Significance of the van der Waals force on the formation of the microstructure of wind-blown loess: An investigation using modified Discontinuous Deformation Analysis.COMPUTERS AND GEOTECHNICS,148,13.
MLA Li, Qiang,et al."Significance of the van der Waals force on the formation of the microstructure of wind-blown loess: An investigation using modified Discontinuous Deformation Analysis".COMPUTERS AND GEOTECHNICS 148(2022):13.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。