Evolution of Localized Damage Zone in Heterogeneous Media

doi:10.1177/1056789509359660

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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
发表期刊	International Journal of Damage Mechanics
	2010
卷号	19 期号:7 页码:787-804
ISSN	1056-7895
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.
关键词	Localized Zone Catastrophic Rupture Heterogeneous Material Strain Localization Deformation Granite Bands
DOI	10.1177/1056789509359660
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000281245000003
关键词[WOS]	STRAIN LOCALIZATION ; DEFORMATION ; GRANITE ; BANDS
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
项目资助者	National Natural Science Foundation of China [90715001, 10721202, 10572139, 10972218, 10802073] ; National Basic Research Program of China [2007CB814800] ; CAS
引用统计	被引频次：30[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/43475
专题	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.

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