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DOI	10.1016/j.cma.2020.113100
	Multiscale modeling of thermo-mechanical responses of granular materials: A hierarchical continuum-discrete coupling approach
	Zhao, Shiwei; Zhao, Jidong; Lai, Yuanming
发表日期	2020
ISSN	0045-7825
EISSN	1879-2138
卷号	367
英文摘要	A hierarchical multiscale coupling of the finite element method (FEM) and the discrete element method (DEM) is proposed to model coupled thermo-mechanical behavior of granular materials. The DEM is employed to model the thermo-mechanical responses of a representative volume element (RVE, a granular assembly) embedded at a Gauss (quadrature) point of the FEM. The material responses derived from each Gauss point feed two superimposed FEMs to find global solutions subject to two concurrent boundary value problems (BVPs), i.e., heat conduction and mechanical deformation. The two concurrent FEMs exchange information on temperature change and fabric variation at their commonly shared Gauss points. The proposed approach is benchmarked by two examples of transient and steady-state thermal conduction where analytical solutions are available. It is further applied to investigating the thermo-mechanical responses of confined granular columns under cyclic thermal loads with emphasis placed on the effect of boundary condition and inherent anisotropy of a granular column. The proposed approach offers a novel multiscale pathway to model thermo-mechanical responses of granular media based on sound physics. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Multiscale modeling; Granular materials; Thermo-mechanical problem; FEM-DEM coupling
语种	英语
WOS研究方向	Engineering ; Mathematics ; Mechanics
WOS类目	Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications ; Mechanics
WOS关键词	ELEMENT-METHOD ; THERMAL-CONDUCTIVITY ; CFD-DEM ; LOCALIZATION ; MACRO ; MEDIA ; SHAPE ; SIMULATIONS ; EVOLUTION ; FRAMEWORK
WOS记录号	WOS:000562023900002
来源期刊	COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239565
作者单位	[Zhao, Shiwei; Zhao, Jidong] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clearwater Bay, Hong Kong, Peoples R China; [Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Shiwei,Zhao, Jidong,Lai, Yuanming. Multiscale modeling of thermo-mechanical responses of granular materials: A hierarchical continuum-discrete coupling approach[J],2020,367.
APA	Zhao, Shiwei,Zhao, Jidong,&Lai, Yuanming.(2020).Multiscale modeling of thermo-mechanical responses of granular materials: A hierarchical continuum-discrete coupling approach.COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING,367.
MLA	Zhao, Shiwei,et al."Multiscale modeling of thermo-mechanical responses of granular materials: A hierarchical continuum-discrete coupling approach".COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING 367(2020).