The influence of hole diameter on the fracture of quasi-brittle geomaterial in the stress concentration zone under non-uniformly distributed compression has been studied theoretically and experimentally taking into account the size effect. The failure load is determined using modified nonlocal criteria derived from the average stress criterion, the point stress criterion, and the fictitious crack criterion and containing a. complex parameter that characterizes the size of the fracture process zone and takes into account not only the material structure, but also the plastic properties of the material, the geometry of the sample, and loading conditions. The calculation results are compared with experimental data.

中文翻译：

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非均匀分布压缩下圆孔准脆性土工材料的断裂

考虑尺寸效应，从理论上和实验上研究了孔径对应力集中区准脆性土工材料在非均匀分布压缩下断裂的影响。破坏载荷是使用从平均应力准则、点应力准则和虚拟裂纹准则导出的修正非局部准则确定的，并且包含 a。表征断裂过程区大小的复杂参数，不仅考虑材料结构，还考虑材料的塑性特性、样品的几何形状和加载条件。计算结果与实验数据进行了比较。