Effect of Loading Rate on Crack Resistance within the Kinetic Concept of Thermal Fluctuation Mechanism of Rock Failure
V. P. EFIMOV
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: прочность, долговечность, трещиностойкость, скорость нагружения, изгиб, начальная энергия активации разрушения, strength, endurance, crack resistance, loading rate, bending, initial energy of failure actuation
Abstract
Based on the strength and crack resistance tests of dolerite and gabbro-diorite samples subjected to bending as a function of loading rate, it is shown that the kinetic constants of strength in Zhurkov model have the same values in the localized and nonlocalized failure modes. The tests on destruction of an organic glass sample with an edge crack yield the similar results.
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