THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS

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	THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS
	Feng, Xiating; Zhou, Hui; Zhang, Kai; Hu, Dawei; Zhao, Yang
刊名	ACTA MECHANICA SOLIDA SINICA
	2009
卷号	22 期号:3 页码:251-260
关键词	rock/soil-like porous materials generalized model for effective stress coefficient tensor equivalent connectivity index of pore genetic algorithm
ISSN号	0894-9166
英文摘要	Physical mechanisms and influencing factors on the effective stress coefficient for rock/soil-like porous materials are investigated, based on which equivalent connectivity index is proposed. The equivalent connectivity index, relying on the meso-scale structure of porous material and the property of liquid, denotes the connectivity of pores in Representative Element Area (REA). If the conductivity of the porous material is anisotropic, the equivalent connectivity index is a second order tensor. Based on the basic theories of continuous mechanics and tenser analysis, relationship between area porosity and volumetric porosity of porous materials is deduced. Then a generalized expression, describing the relation between effective stress coefficient tenser and equivalent connectivity tenser of pores, is proposed, and the expression can be applied to isotropic media and also to anisotropic materials. Furthermore, evolution of porosity and equivalent connectivity index of the pore are studied in the strain space, and the method to determine the corresponding functions in expressions above is proposed using genetic algorithm and genetic programming. Two applications show that the results obtained by the method in this paper perfectly agree with the test data. This paper provides an important theoretical support to the coupled hydro-mechanical research.
WOS研究方向	Materials Science ; Mechanics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000268079800008
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3208]
专题	岩土力学所知识全产出_期刊论文岩土力学所知识全产出国家重点实验室知识产出_期刊论文
作者单位	Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Feng, Xiating,Zhou, Hui,Zhang, Kai,et al. THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS[J]. ACTA MECHANICA SOLIDA SINICA,2009,22(3):251-260.
APA	Feng, Xiating,Zhou, Hui,Zhang, Kai,Hu, Dawei,&Zhao, Yang.(2009).THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS.ACTA MECHANICA SOLIDA SINICA,22(3),251-260.
MLA	Feng, Xiating,et al."THEORETICAL MODEL OF EFFECTIVE STRESS COEFFICIENT FOR ROCK/SOIL-LIKE POROUS MATERIALS".ACTA MECHANICA SOLIDA SINICA 22.3(2009):251-260.