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Ordering and stress transmission in packings of straight and curved spherocylinders

机译：直线和弯曲球形圆柱体填料的有序化和应力传递

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In this work we apply the discrete element method (DEM) to model packings of spherocylinders. The so-called composite spheres method was used to construct particles of different aspect ratio, surface shape and curvature. Using the DEM we probe in detail the effect of particle curvature and surface shape on packing morphology and stress transmission. We find that particle shape has a remarkable influence on both the packing morphology (quantified via the solid fraction, particle orientation distribution and radial distribution function) and stress transmission. Specifically, elongated particles have a high preference for horizontal alignment, whereas an increasing particle curvature leads to a more continuous (i.e. less discrete) particle orientation distribution. Generally, we observe that rough and curved particles have a stronger tendency for interlocking (in particular for small particle aspect ratios, i.e. AR = 2 and 3) leading to the formation of dense packing structures. In addition packings of rough and curved particles of small aspect ratios favor stress transmission in the gravitational direction, thus, limiting stress saturation with depth.
机译：在这项工作中，我们将离散元素方法（DEM）应用于球形圆柱的填充模型。所谓的复合球法用于构造不同纵横比，表面形状和曲率的颗粒。使用DEM，我们详细探讨了颗粒曲率和表面形状对堆积形态和应力传递的影响。我们发现，颗粒形状对堆积形态（通过固含量，颗粒取向分布和径向分布函数进行量化）和应力传递都具有显着影响。具体地，细长的颗粒对水平取向具有高度的偏好，而增加的颗粒曲率导致更连续的（即，较少离散的）颗粒取向分布。通常，我们观察到粗糙和弯曲的颗粒具有更强的互锁趋势（特别是对于小颗粒长宽比，即AR = 2和3），导致形成密集的堆积结构。另外，小纵横比的粗糙和弯曲颗粒的堆积有利于应力在重力方向上的传递，从而限制了应力随深度的饱和。

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