Relations between parameters of fracture processes on different scale levels
journal contributionposted on 10.01.2019 by N.V. Mikhailova, G. A. Volkov, Yu. V. Petrov, I. V. Smirnov, P.Y. Onawumi, Anish Roy, Vadim Silberschmidt
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© 2018, Pleiades Publishing, Ltd. 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.
This study was supported by the Marie Curie Foundation (FP7 IRSES project TAMER IRSESGA-2013-610547) and by the Russian Foundation for Basic Research (project no. 17-01-00618) and by grant of the President of the Russian Federation (project no. MK-6312.2018.1).
- Mechanical, Electrical and Manufacturing Engineering