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- W2772030371 abstract "The evolution patterns of cracks propagation still stays in the whole process of cracks initiation-extension-failure of microscopic level, and does not explain the macroscopic failure pattern of rock through the process of cracks propagation. A three-dimensional visualization model of cracks was established, which provided a new way to study the transition from microscopic scale to macroscopic scale. Verifying the relationship between the areas and lengths of cracks and stress, based on CT scanning results of sandstone, CT images was analyzed using the MATLAB software and the evolution pattern of mesoscopic cracks were explored under uniaxial cyclic load/unload. Crack growth factor model was proposed to quantitatively describe the propagation and evolution of cracks in the process of sandstone fracture, which provided a theoretical basis for studying the effect of meso-structure change on the macroscopic damage of sandstone,and extended to all hard rock. It revealed the nonlinear dynamic evolution patterns of cracks propagation in the process of sandstone failure using CT parameters. This model provided a new method for predicitng rock dynamic hazard. Compared with the actual test results using the three-dimensional reconstruction and numerical simulation of roof and bottom sandstone’s mesostructure of initial stage, the correctness of numerical simulation was verified." @default.
- W2772030371 created "2017-12-22" @default.
- W2772030371 creator A5056459720 @default.
- W2772030371 date "2017-12-15" @default.
- W2772030371 modified "2023-09-24" @default.
- W2772030371 title "Experimental Investigation on Nonlinear Dynamic Evolution Patterns of Cracks in Rock Failure Process" @default.
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- W2772030371 doi "https://doi.org/10.1007/978-981-10-7548-3_5" @default.
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