Based on existing triaxial compression experimental data, a new empirical failure criterion with wide applicability was proposed considering hydrostatic pressure, second stress invariance, and maximum shear stress. Four fitting evaluation indicators were used to verify the consistency of the new failure criterion, and the differences with the other 6 failure criteria were discussed. The characteristics of the new failure criteria in the principal stress space were finally analyzed. The results indicate that (1) the new failure criterion exhibits strong predictive ability for triaxial experiments and has good applicability for both intact and jointed rocks; (2) the influence of hydrostatic pressure on the failure surface exhibits a non-linear trend, and different hydrostatic pressure also exhibits different distribution patterns on the deviatoric stress plane, with a distribution characteristic pattern of hexagonal snowflake-regular hexagon. The maximum shear stress has a torsional effect on the new criterion, in the three-dimensional failure surface. The parameters and of the rock have an impact on the failure surface morphology of the new criterion function on the offset surface.

中文翻译：

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三轴压缩下岩石的非线性经验破坏准则


基于现有的三轴压缩实验数据，考虑静水压力、二次应力不变性和最大剪应力，提出了一种具有广泛适用性的新的经验失效准则。采用4个拟合评价指标验证新失效准则的一致性，并讨论与其他6个失效准则的差异。最后分析了主应力空间中新失效准则的特点。结果表明：（1）新的破坏准则对三轴试验表现出较强的预测能力，对完整岩石和节理岩石均具有良好的适用性； (2)静水压力对破坏面的影响呈现出非线性趋势，不同的静水压力在偏应力平面上也呈现出不同的分布模式，具有六边形雪花-正六边形的分布特征模式。在三维破坏面中，最大剪应力对新准则具有扭转效应。岩石参数 和 对偏置面上新准则函数的破坏面形貌有影响。