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采用二维离散单元法,建立了4种不同形状的颗粒,研究了颗粒形状对模拟双轴试验的影响以及4种不同颗粒试样宏观特性随颗粒细观参数的变化关系。研究结果表明:在其它细观参数相同的情况下,颗粒形状对颗粒试样的宏观特性有较大的影响,其中3种异形颗粒由于颗粒形状的特殊性,显著地提高了颗粒试样的剪切强度。同时通过模拟双轴试验分析表明,4种颗粒试样宏观特性与细观参数的变化规律均比较一致。
Using two-dimensional discrete element method, four kinds of particles with different shapes were established. The influence of particle shape on the simulation biaxial test and the relationship between the macroscopic properties of the four different kinds of particles and the parameters of the particles were studied. The results show that the particle shape has a great influence on the macroscopic characteristics of the particle sample under the same conditions of other meso parameters. The special shape of the three kinds of shaped particles significantly improves the shear strength of the particle sample Cut the intensity. At the same time, through the simulation biaxial test analysis shows that the macroscopic characteristics of the four kinds of particle samples and the variation law of the mesoscopic parameters are relatively consistent.