Brittle and Quasi-Brittle Fracture of Geomaterials with Circular Hole in Non-Uniform Compression
S. V. Suknev
Chersky Institute of Mining of the North, Siberian Branch, Russian Academy of Sciences, Yakutsk, Russia
Keywords: хрупкое разрушение, квазихрупкое разрушение, геоматериалы, масштабный эффект, отверстие, градиент напряжений, нелокальные критерии разрушения, brittle fracture, quasi-brittle fracture, geomaterials, size effect, hole, stress gradient, non-local fracture criteria
Abstract
The author studies the influence exerted by the boundary conditions and diameter of a circular hole on tensile fracture initiation in brittle and quasi-brittle geomaterials subjected to non-uniform compression with regard to the size effect. The calculation of the critical stress uses the modified non-local and gradient fracture criteria. The calculation results are compared with the experimental data. The developed criteria allow taking into account the size effect when the size of the stress concentration zone is varied by changing both geometry and boundary conditions of the stress raiser.
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