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DOI	10.1016/j.engfracmech.2021.107610
	Numerical investigation of the tensile strength of loess using discrete element method
	You, Zhilang; Zhang, Mingyi; Liu, Fei; Ma, Yuwei
通讯作者	Zhang, MY (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0013-7944
EISSN	1873-7315
卷号	247
英文摘要	The tensile strength of loess is important for the tension-related crack and failure in the Loess regions. While the previous work on the tensile strength of loess mainly focuses on the test method and its variation with different internal and external factors, the micro-mechanical characteristics of the tensile experiments are seldom studied. Taking the unconfined penetrated test (UP test) as example, the tensile strengths and internal stress distributions of undisturbed loess samples under the loading plate-sample ratios (d/D) ranging from 0.05 to 0.95 are numerically investigated using discrete element method. The internal stress distribution, failure pattern of sample and variation of internal crack are clearly reflected by the discrete element modelling. The DEM simulation results also show that: 1) the d/D in the range of 0.15 to 0.35 is recommended for measuring the tensile strength of undisturbed loess; 2) the tensile strength of undisturbed loess increases with d/D recommended above ;3) the failure of sample is mainly controlled by the tensile stress when the d/D is equal or lower than a critical d/D 0.50, while that is mainly controlled by the compressive stress when the d/D is larger than a critical d/D 0.50. This study shows the capability of discrete element method to simulate the UP test, thereby providing us a relatively reliable way to investigate the tensile strength of loess numerically and to explore the internal stress and crack distribution of soil sample.
关键词	SHEAR LANZHOU MODEL COMPRESSION LANDSLIDE MECHANISM CITY
英文关键词	Loess; Discrete element modelling; Tensile strength; Disk-sample diameter ratio; Internal stress distribution
语种	英语
WOS研究方向	Mechanics
WOS类目	Mechanics
WOS记录号	WOS:000640441000001
来源期刊	ENGINEERING FRACTURE MECHANICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253793
作者单位	[You, Zhilang; Zhang, Mingyi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Ma, Yuwei] Shihezi Univ, Coll Water & Architecture Engn, Shihezi 832003, Peoples R China; [Liu, Fei] Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shanxi, Peoples R China; [You, Zhilang; Zhang, Mingyi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	You, Zhilang,Zhang, Mingyi,Liu, Fei,et al. Numerical investigation of the tensile strength of loess using discrete element method[J]. 中国科学院西北生态环境资源研究院,2021,247.
APA	You, Zhilang,Zhang, Mingyi,Liu, Fei,&Ma, Yuwei.(2021).Numerical investigation of the tensile strength of loess using discrete element method.ENGINEERING FRACTURE MECHANICS,247.
MLA	You, Zhilang,et al."Numerical investigation of the tensile strength of loess using discrete element method".ENGINEERING FRACTURE MECHANICS 247(2021).