2D particle contact-based meshfree method in CDEM and its application in geotechnical problems

doi:10.1108/EC-04-2014-0095

IMECH-IR > 流固耦合系统力学重点实验室

	2D particle contact-based meshfree method in CDEM and its application in geotechnical problems
	Feng C(冯春); Li SH(李世海); Onate E; Feng, C (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100080, Peoples R China.
发表期刊	ENGINEERING COMPUTATIONS
	2015
卷号	32 期号:4 页码:1080-1103
ISSN	0264-4401
摘要	Purpose - Continuum-based discrete element method is an explicit numerical method, which is a combination of block discrete element method (DEM) and FEM. When simulating large deformation problems, such as cutting, blasting, water-like material flowing, the distortion of elements will lead to no convergence of the numerical system. To solve the convergence problem, a particle contact-based meshfree method (PCMM) is introduced in. The paper aims to discuss this issue. Design/methodology/approach - PCMM is based on traditional particle DEM, and use particle contacts to generate triangular elements. If three particles are contact with each other, the element will be created. Once elements are created, the macroscopic constitutive law could be introduced in. When large deformation of element occurs, the contact relationship between particles will be changed. Those elements that do not meet the contact condition will be deleted, and new elements that coincide with the relationship will be generated. By the deletion and creation of elements, the convergence problem induced by element distortion will be eliminated. To solve FEM and PCMM coupled problems, a point-edge contact model is introduced in, and normal and tangential springs are adopted to transfer the contact force between particles and blocks. Findings - According to the deletion and recreation of elements based on particle contacts, PCMM could simulate large deformation problems. Some numerical cases (i.e. elastic field testing, uniaxial compression analysis and wave propagation simulation) show the accuracy of PCMM, and others (i.e. soil cutting, contact burst and water-like material flowing) show the rationality of PCMM. Originality/value - In traditional particle DEM, contact relationships are used to calculate contact forces. But in PCMM, contact relationships are adopted to generate elements. Compared to other meshfree methods, in PCMM, the element automatic deletion and recreation technique is used to solve large deformation problems.
关键词	Numerical Simulation Cutting Meshfree Method Particle Contact Pcmm Rock And Soil
DOI	10.1108/EC-04-2014-0095
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000357272600009
WOS研究方向	Computer Science ; Engineering ; Mathematics ; Mechanics
WOS类目	Computer Science, Interdisciplinary Applications ; Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics
项目资助者	National Basic Research Program of the Ministry of Science and Technology of China [2010CB731506] ; National Key Technology Research and Development Program of the Ministry of Science and Technology of China [2012BAK10B01] ; Youth Science Fund of National Natural Science Foundation of China [11302230]
课题组名称	LMFS工程地质体力学(LEM)
论文分区	二类/Q1
引用统计	被引频次：5[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/311007/55340
专题	流固耦合系统力学重点实验室
通讯作者	Feng, C (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Feng C,Li SH,Onate E,et al. 2D particle contact-based meshfree method in CDEM and its application in geotechnical problems[J]. ENGINEERING COMPUTATIONS,2015,32,4,:1080-1103.
APA	Feng C,Li SH,Onate E,&Feng, C .(2015).2D particle contact-based meshfree method in CDEM and its application in geotechnical problems.ENGINEERING COMPUTATIONS,32(4),1080-1103.
MLA	Feng C,et al."2D particle contact-based meshfree method in CDEM and its application in geotechnical problems".ENGINEERING COMPUTATIONS 32.4(2015):1080-1103.

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