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- W3048505889 endingPage "102743" @default.
- W3048505889 startingPage "102743" @default.
- W3048505889 abstract "Bimrocks feature stiff blocks randomly distributed in a soft matrix. Despite their wide distribution in nature, their significant effects on the failure of rock structures such as slopes, mines and tunnels have not been fully understood. Bimrocks behave differently as compared with other rock types since they contain mix of blocks of different strength, size and volume distribution and a matrix of different physical and mechanical characteristics. The purpose of this study is to investigate deformation behaviour and crack development trends of bimrocks containing blocks of different sizes (small <1 mm, medium 2–4 mm, and large 5–8 mm). The Brazilian disc test is performed with the digital image correlation (DIC) technique being employed for deformation analysis. It is found that the size of blocks significantly influences the deformation and failure behaviour of a bimrock. Bimrocks with large blocks exhibit both tensile cracks parallel to the loading direction and shear cracks inclined towards the loading direction. Moreover, the development of plastic deformation is highly dependent upon block size. In particular, bimrocks with large blocks exhibit obvious development of plastic deformation, while no plastic deformation is observed for those with small blocks in the pre-peak loading stage. In fact, the specimens with small blocks cannot be called a bimrock since they behave similar to a homogenous intact disc specimen in which a crack splits the disc into two halves in a typical Brazilian test." @default.
- W3048505889 created "2020-08-18" @default.
- W3048505889 creator A5062386276 @default.
- W3048505889 creator A5081905540 @default.
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- W3048505889 date "2020-10-01" @default.
- W3048505889 modified "2023-09-23" @default.
- W3048505889 title "Crack initiation and failure of block-in-matrix rocks under Brazilian test using digital image correlation" @default.
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- W3048505889 doi "https://doi.org/10.1016/j.tafmec.2020.102743" @default.
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