Effect of loading rate on fracture toughness within the kinetic concept of thermal fluctuation mechanism of rock failure

摘要

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 non-localized failure modes. The tests on destruction of an organic glass sample with an edge crack yield the similar results.