Evolution of Localized Damage Zone in Heterogeneous Media

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	Evolution of Localized Damage Zone in Heterogeneous Media
	Hao SW; Xia MF(夏蒙棼); Ke FJ(柯孚久); Bai YL(白以龙); Bai YL
刊名	International Journal of Damage Mechanics
	2010
通讯作者邮箱	baiyl@lnm.imech.ac.cn
卷号	19 期号:7 页码:787-804
关键词	Localized Zone Catastrophic Rupture Heterogeneous Material Strain Localization Deformation Granite Bands
ISSN号	1056-7895
通讯作者	Bai YL
合作状况	国内
中文摘要	Evolution of localized damage zone is a key to catastrophic rupture in heterogeneous materials. In the present article, the evolutions of strain fields of rock specimens are investigated experimentally. The observed evolution of fluctuations and autocorrelations of strain fields under uniaxial compression demonstrates that the localization of deformation always appears ahead of catastrophic rupture. In particular, the localization evolves pronouncedly with increasing deformation in the rock experiments. By means of the definition of the zone with high strain rate and likely damage localization, it is found that the size of the localized zone decreases from the sample size at peak load to an eventual value. Actually, the deformation field beyond peak load is bound to suffer bifurcation, namely an elastic unloading part and a continuing but localized damage part will co-exist in series in a specimen. To describe this continuous bifurcation and localization process observed in experiments, a model on continuum mechanics is developed. The model can explain why the decreasing width of localized zone can lead stable deformation to unstable, but it still has not provided the complete equations governing the evolution of the localized zone.
类目[WOS]	Materials Science, Multidisciplinary ; Mechanics
研究领域[WOS]	Materials Science ; Mechanics
关键词[WOS]	STRAIN LOCALIZATION ; DEFORMATION ; GRANITE ; BANDS
收录类别	SCI
资助信息	National Natural Science Foundation of China [90715001, 10721202, 10572139, 10972218, 10802073]; National Basic Research Program of China [2007CB814800]; CAS
原文出处	http://ijd.sagepub.com/content/early/2010/03/09/1056789509359660.abstract?patientinform-links=yes&legid=spijd;1056789509359660v1
语种	英语
WOS记录号	WOS:000281245000003
公开日期	2011-03-01 ; 2011-03-30
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/43475]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Bai YL
推荐引用方式 GB/T 7714	Hao SW,Xia MF,Ke FJ,et al. Evolution of Localized Damage Zone in Heterogeneous Media[J]. International Journal of Damage Mechanics,2010,19(7):787-804.
APA	Hao SW,夏蒙棼,柯孚久,白以龙,&Bai YL.(2010).Evolution of Localized Damage Zone in Heterogeneous Media.International Journal of Damage Mechanics,19(7),787-804.
MLA	Hao SW,et al."Evolution of Localized Damage Zone in Heterogeneous Media".International Journal of Damage Mechanics 19.7(2010):787-804.