圧縮応力下での岩質材料の破壊条件について

抄録

In the compression test of rock-like materials such as rocks and concretes, so many cracks initiate from initial flaws, and the propagated cracks form a crack pattern responsible for the failure or collapse of the specimen.
In order to study the failure process of rolk-like materials, that is the process from crack initiation to failure, the stochastic distribution of initial flaws in the specimen was assumed.
The original and modified (by McClintock and Walsh) Griffith theory were employed as the crack initiation criteria.
The results obtained explain well the experimentally revealed failure process of concrete or cement mortar specimens under compressive load, and also explain the complicated failure process arising from the inhomogeneity of the material.