Abstract The effect of particle shape on particle breakage is investigated through triaxial tests on sand assemblies mixed with non-spherical agglomerates using the discrete element method. Mixed assembly is generated in terms of cumulative distribution of sphericity of real sands. Comparable macro-mechanical results are found between DEM and experimental observations, including non-linear stress-strain relationship, peak deviatoric stress, and peak friction angle. More broken bonds and agglomerates numbers are generated in mixed assembly than that in spherical assembly. The hyperbolic relationship between particle breakage and energy input is found to have relevance to particle shape, and the fitting result of mixed assembly is in better accordance with real sands.

中文翻译：

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颗粒形状对颗粒组件中颗粒破碎影响的 DEM 探索

摘要 使用离散元法，通过对混有非球形团聚体的砂组件进行三轴试验，研究了颗粒形状对颗粒破碎的影响。混合组合是根据实砂球度的累积分布产生的。在 DEM 和实验观察之间发现了可比较的宏观力学结果，包括非线性应力应变关系、峰值偏应力和峰值摩擦角。混合组装比球形组装产生更多的断裂键和团聚体数量。发现颗粒破碎与能量输入之间的双曲线关系与颗粒形状有关，混合装配的拟合结果更符合实砂。