Abstract The interaction between dry granular materials and an inclined plate is numerically studied using a three-dimensional discrete element method (DEM) simulation. In the simulation, a plate is dragged horizontally through densely packed dry granular materials. To examine the effect of the rake angle α of the plate on the drag force acting on the plate, three cases with α = 50°, 70°, and 90° are compared (α = 90° for a vertical plate). The results show that for all cases, the force oscillates as the plate advances. As α decreases, the amplitude and frequency of the force oscillation decrease and increase, respectively. The force oscillation is attributed to the periodic evolution of a shear band formed in the materials. The relationships between the rake angle, evolution of the shear band, and drag force can be explained quantitatively by using a three-dimensional wedge model considering the variation of the local volume fraction inside the shear band.

中文翻译：

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干粒料与斜板的相互作用（大型DEM模拟与三维楔形模型对比）

摘要 使用三维离散元法（DEM）模拟数值研究了干颗粒材料与倾斜板之间的相互作用。在模拟中，一块板被水平拖动通过密集堆积的干燥颗粒材料。为了检查板的前角 α 对作用在板上的阻力的影响，比较了 α = 50°、70° 和 90° 的三种情况（垂直板的α = 90°）。结果表明，在所有情况下，力都会随着板块的前进而振荡。随着 α 减小，力振荡的幅度和频率分别减小和增加。力振荡归因于材料中形成的剪切带的周期性演变。前角、剪切带演化、