INVESTIGATION OF DYNAMIC FRACTURE OF SANDSTONE ROCKS BASED ON THE INCUBATION TIME CRITERION
A. N. Martem'yanov1, Yu. V. Petrov1,2
1Saint Petersburg State University, Saint Petersburg, Russia
2Institute of Mechanics, Nizhni Novgorod, Russia
Keywords: динамическая прочность, импульсная нагрузка, составной стержень Гопкинсона, инкубационное время, горная порода, песчаник, пористость, насыщенность, dynamic strength, pulsed loading, split Hopkinson bar, incubation time, rock, sandstone, porosity, saturation
Abstract
Available results of laboratory investigations of the dynamic strength of various rock types are analyzed with the use of the incubation time criterion in both compression and tension cases. Based on this approach, a theoretical curve is constructed, which describes the increase in the ultimate stress of sample fracture for some types of sandstone. Incubation times for all materials considered in the study are estimated.
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