Abstract
The fracture criteria of linear fracture mechanics constructed by the Griffith-Irwin approach are inapplicable in the subcritical state in the case of loading of materials, weakened by parallel cracks, by compressive forces directed along the cracks [17, 20]. The monograph [3] examined a general approach to the study of such problems and presented the corresponding fracture criteria along with a detailed bibliography. The same publication examined problems of the fracture in compression of an infinite material with one crack or a system of cracks located in one plane. These problems dealt with elastic, composite, and plastic models of the materials. A three-dimensional axisymmetric problem for the same models in the case of a surface crack in a half-space was examined in [7, 8, 14-16, 21]. The studies [5, 6, 10] looked at a similar problem involving two parallel internal cracks in space for highly elastic and composite models.
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