Analysis of a microcrack model and constitutive equations for time-dependent dilatancy of rocks

	Analysis of a microcrack model and constitutive equations for time-dependent dilatancy of rocks
	Chen, Z
刊名	GEOPHYSICAL JOURNAL INTERNATIONAL
	2003-11-01
卷号	155 期号:2 页码:601-608
关键词	constitutive equation crack growth creep dilatancy microcrack
ISSN号	0956-540X
英文摘要	Based on experimental observations and theoretical analyses, the author introduces an ideal microcrack model in which an array of cracks with the same shape and initial size is distributed evenly in rocks. The mechanism of creep dilatancy for rocks is analysed theoretically. Initiation, propagation and linkage of pre-existing microcracks during creep are well described. Also, the relationship between the velocity of microcrack growth and the duration of the creep process is derived numerically. The relationship agrees well with the character of typical experimental creep curves, and includes three stages of creep. Then the damage constitutive equations and damage evolution equations, which describe the dilatant behaviour of rocks, are presented. Because the dilatant estimated value is taken as the damage variable, the relationship between the microscopic model and the macroscopic constitutive equations is established. In this way the mechanical behaviour of rocks can be predicted.
语种	英语
出版者	BLACKWELL PUBLISHING LTD
WOS记录号	WOS:000186173500023
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78983]
专题	中国科学院地质与地球物理研究所
通讯作者	Chen, Z
作者单位	Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Chen, Z. Analysis of a microcrack model and constitutive equations for time-dependent dilatancy of rocks[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2003,155(2):601-608.
APA	Chen, Z.(2003).Analysis of a microcrack model and constitutive equations for time-dependent dilatancy of rocks.GEOPHYSICAL JOURNAL INTERNATIONAL,155(2),601-608.
MLA	Chen, Z."Analysis of a microcrack model and constitutive equations for time-dependent dilatancy of rocks".GEOPHYSICAL JOURNAL INTERNATIONAL 155.2(2003):601-608.