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DOI	10.1007/s11440-021-01336-0
	A micromechanics-based elasto-plastic model for granular media combined with Cosserat continuum theory
	Tian, Jianqiu; Lai, Yuanming; Liu, Enlong; Yang, Yunming
通讯作者	Liu, EL (通讯作者)，Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China. ; Liu, EL (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	2020
ISSN	1861-1125
EISSN	1861-1133
英文摘要	This paper is devoted to the micromechanical model of granular materials based on the Cosserat continuum theory. The generalised stress-strain relationships of a representative element volume are closely related to the micro elasto-plastic force-displacement and moment-rotation laws. With the help of generalised micro-macro relations, a micromechanical model is presented by aggregating the generalised micro elasto-plastic inter-particle contact laws in each contact orientation. A corresponding implicit multiscale integration algorithm for integrating the micromechanical model is proposed. Furthermore, the micromechanical model and implicit multiscale integration algorithm are simplified to consider a two-dimensional condition, and the Romberg integration of the numerical quadrature formula is also introduced in this condition. Compared with the data of Hostun sand and the results of DEM simulations for different particle shapes, it is demonstrated that the proposed micromechanical model can describe both the macro and micro responses of granular materials relatively well, such as strain softening/hardening, volumetric compaction/dilatancy, particle rotation, and evolution of the coordination number.
关键词	SHEAR-BAND DEVELOPMENT CRITICAL-STATE CONSTITUTIVE RELATIONS ELASTIC-MODULI STRAIN LOCALIZATION ROLLING RESISTANCE MICROPLANE MODEL PARTICLE-SHAPE RANDOM PACKING FORCE-CHAIN
英文关键词	Constitutive model; Cosserat theory; Granular materials; Integration algorithm; Microstructure; Multiscale responses
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:000699882200001
来源期刊	ACTA GEOTECHNICA
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/253951
作者单位	[Tian, Jianqiu; Liu, Enlong] Sichuan Univ, Coll Water Resource & Hydropower, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China; [Lai, Yuanming; Liu, Enlong] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yang, Yunming] Univ Nottingham Ningbo China, Ningbo Nottingham New Mat Inst, Ningbo 315100, Peoples R China
推荐引用方式 GB/T 7714	Tian, Jianqiu,Lai, Yuanming,Liu, Enlong,et al. A micromechanics-based elasto-plastic model for granular media combined with Cosserat continuum theory[J]. 中国科学院西北生态环境资源研究院,2020.
APA	Tian, Jianqiu,Lai, Yuanming,Liu, Enlong,&Yang, Yunming.(2020).A micromechanics-based elasto-plastic model for granular media combined with Cosserat continuum theory.ACTA GEOTECHNICA.
MLA	Tian, Jianqiu,et al."A micromechanics-based elasto-plastic model for granular media combined with Cosserat continuum theory".ACTA GEOTECHNICA (2020).