Dynamic failure of dry and fully saturated limestone samples based on incubation time concept
This paper outlines the results of experimental study of the dynamic rock failure based on the comparison of dry and saturated limestone samples obtained during the dynamic compression and split tests. The tests were performed using the Kolsky method and its modifications for dynamic splitting. The...
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doaj-13df6bef89484c15be5346ef49e473b82020-11-24T22:16:41ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552017-02-019112513410.1016/j.jrmge.2016.09.004Dynamic failure of dry and fully saturated limestone samples based on incubation time conceptYuri V. Petrov0Ivan V. Smirnov1Grigory A. Volkov2Andrei K. Abramian3Аnatoliy M. Bragov4Stanislav N. Verichev5Saint Petersburg University, Universitetskaya nab. 7-9, Saint Petersburg, 199034, RussiaSaint Petersburg University, Universitetskaya nab. 7-9, Saint Petersburg, 199034, RussiaSaint Petersburg University, Universitetskaya nab. 7-9, Saint Petersburg, 199034, RussiaInstitute of Problems of Mechanical Engineering, Russian Academy of Sciences, Bolshoj pr. 61, V.O., Saint Petersburg, 199178, RussiaLobachevsky State University of Nizhni Novgorod, Prospekt Gagarina 23, Nizhny Novgorod, 603950, RussiaAllseas Engineering B.V., Poortweg 12, Delft, 2612, PA, The NetherlandsThis paper outlines the results of experimental study of the dynamic rock failure based on the comparison of dry and saturated limestone samples obtained during the dynamic compression and split tests. The tests were performed using the Kolsky method and its modifications for dynamic splitting. The mechanical data (e.g. strength, time and energy characteristics) of this material at high strain rates are obtained. It is shown that these characteristics are sensitive to the strain rate. A unified interpretation of these rate effects, based on the structural–temporal approach, is hereby presented. It is demonstrated that the temporal dependence of the dynamic compressive and split tensile strengths of dry and saturated limestone samples can be predicted by the incubation time criterion. Previously discovered possibilities to optimize (minimize) the energy input for the failure process is discussed in connection with industrial rock failure processes. It is shown that the optimal energy input value associated with critical load, which is required to initialize failure in the rock media, strongly depends on the incubation time and the impact duration. The optimal load shapes, which minimize the momentum for a single failure impact, are demonstrated. Through this investigation, a possible approach to reduce the specific energy required for rock cutting by means of high-frequency vibrations is also discussed.http://www.sciencedirect.com/science/article/pii/S1674775516302037Dynamic strengthIncubation time criterionSplit Hopkinson pressure bar (SHPB) testTensile strengthCompressive strengthWater-saturated limestoneVibration-assisted rock cutting |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuri V. Petrov Ivan V. Smirnov Grigory A. Volkov Andrei K. Abramian Аnatoliy M. Bragov Stanislav N. Verichev |
spellingShingle |
Yuri V. Petrov Ivan V. Smirnov Grigory A. Volkov Andrei K. Abramian Аnatoliy M. Bragov Stanislav N. Verichev Dynamic failure of dry and fully saturated limestone samples based on incubation time concept Journal of Rock Mechanics and Geotechnical Engineering Dynamic strength Incubation time criterion Split Hopkinson pressure bar (SHPB) test Tensile strength Compressive strength Water-saturated limestone Vibration-assisted rock cutting |
author_facet |
Yuri V. Petrov Ivan V. Smirnov Grigory A. Volkov Andrei K. Abramian Аnatoliy M. Bragov Stanislav N. Verichev |
author_sort |
Yuri V. Petrov |
title |
Dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
title_short |
Dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
title_full |
Dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
title_fullStr |
Dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
title_full_unstemmed |
Dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
title_sort |
dynamic failure of dry and fully saturated limestone samples based on incubation time concept |
publisher |
Elsevier |
series |
Journal of Rock Mechanics and Geotechnical Engineering |
issn |
1674-7755 |
publishDate |
2017-02-01 |
description |
This paper outlines the results of experimental study of the dynamic rock failure based on the comparison of dry and saturated limestone samples obtained during the dynamic compression and split tests. The tests were performed using the Kolsky method and its modifications for dynamic splitting. The mechanical data (e.g. strength, time and energy characteristics) of this material at high strain rates are obtained. It is shown that these characteristics are sensitive to the strain rate. A unified interpretation of these rate effects, based on the structural–temporal approach, is hereby presented. It is demonstrated that the temporal dependence of the dynamic compressive and split tensile strengths of dry and saturated limestone samples can be predicted by the incubation time criterion. Previously discovered possibilities to optimize (minimize) the energy input for the failure process is discussed in connection with industrial rock failure processes. It is shown that the optimal energy input value associated with critical load, which is required to initialize failure in the rock media, strongly depends on the incubation time and the impact duration. The optimal load shapes, which minimize the momentum for a single failure impact, are demonstrated. Through this investigation, a possible approach to reduce the specific energy required for rock cutting by means of high-frequency vibrations is also discussed. |
topic |
Dynamic strength Incubation time criterion Split Hopkinson pressure bar (SHPB) test Tensile strength Compressive strength Water-saturated limestone Vibration-assisted rock cutting |
url |
http://www.sciencedirect.com/science/article/pii/S1674775516302037 |
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