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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
Source PublicationInternational Journal of Damage Mechanics
AbstractEvolution 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.
KeywordLocalized Zone Catastrophic Rupture Heterogeneous Material Strain Localization Deformation Granite Bands
Indexed BySCI
WOS IDWOS:000281245000003
WOS Research AreaMaterials Science ; Mechanics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [90715001, 10721202, 10572139, 10972218, 10802073] ; National Basic Research Program of China [2007CB814800] ; CAS
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorBai YL
Recommended Citation
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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