Dynamic Strength of Limestone in Terms of the Incubation Fracture Time Criterion

Abstract

The results of dynamic compression and splitting of dry and water-saturated limestone are presented. The tests have been performed using the Kolsky method and its modification for dynamic splitting. The strength and fracture time of this material at high strain rates have been obtained. It is shown that these characteristics are sensitive to the strain rate. A unified interpretation of these rate effects based on the incubation time approach is presented. Theoretical calculations show that the application of the incubation time concept allows to select the optimal ratio of duration and amplitude of action, which can reduce energy consumption during production and processing of rocks.