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Relations between Parameters of Fracture Processes on Different Scale Levels

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Abstract

The processes of ultrasonically-assisted drilling (UAD) and the dynamic tests on split Hopkinson pressure bar (SHPB), fracture in which is implemented at various structural-scale levels, are considered. The simulation of UAD based on the Hertz contact problem and the structural−time criterion is presented. The problem of using the value of the fracture incubation time and its linear size obtained from the tests on SHPB in the simulation is considered. A principle of equal power is used for converting the strength parameters into another structural−scale level. The theoretical curve obtained in the simulation is compared with the results of experiments on conventional drilling (CD) and UAD.

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Correspondence to N. V. Mikhailova.

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Translated by V. Bukhanov

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Mikhailova, N.V., Volkov, G.A., Petrov, Y.V. et al. Relations between Parameters of Fracture Processes on Different Scale Levels. Dokl. Phys. 63, 459–461 (2018). https://doi.org/10.1134/S1028335818110095

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  • DOI: https://doi.org/10.1134/S1028335818110095

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