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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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