Abstract

Freestanding columns, built out of nothing but loose gravel and continuous strings can be stable even at several meters in height and withstand vertical loads high enough to severely fragment grains of the column core. We explain this counter-intuitive behavior through dynamic simulations with polyhedral rigid particles and elastic wire chains. We evaluate the fine structure of the particle contact networks, as well as confining forces and reveal fundamental intrinsic differences to the well-studied case of confining silos.

Graphic abstract

中文翻译：

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纤维增强堵塞颗粒材料中力线的反演

摘要

独立式柱子仅由松散的砾石和连续的绳索建造而成，即使在几米高的地方也能保持稳定，并能承受足够高的垂直载荷，足以使柱芯的颗粒严重破碎。我们通过多面体刚性粒子和弹性线链的动态模拟来解释这种反直觉的行为。我们评估了颗粒接触网络的精细结构以及限制力，并揭示了与经过充分研究的限制筒仓案例的根本内在差异。

图文摘要