一个倾斜的颗粒状单层的稳定性:在崩之前,我们可以选择多少个球体?
Eduardo Rojas1, Héctor Alarcón2, Vicente Salinas3
1Department of Mechanical Engineering, Universidad de Antofagasta, Antofagasta, Chile.
Physical review. E
|January 20, 2024
概括
在球包装中模拟了雪崩触发的过程. 使用协调数演变开发了临界提取和崩的预测模型,揭示了一个恒定的临界空隙分数.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 统计力学 统计力学
背景情况:
- 在颗粒状材料中的雪崩是复杂的现象.
- 了解雪崩触发机制对于预测材料流动和稳定性至关重要.
- 离散元素模拟为研究颗粒动力学提供了强大的工具.
研究的目的:
- 通过使用离散元件模拟,在简化颗粒系统中研究雪崩触发.
- 根据系统参数开发雪崩发生的预测模型.
- 为了确定导致球体包装临界崩的条件.
主要方法:
- 从倾斜平面上的六角单层中随机提取球体的离散元素模拟.
- 基于倾斜角度,系统大小和摩擦系数的相位图构造.
- 开发一个平均协调数的进化模型,以预测关键提取.
主要成果:
- 创建了一个阶段图,说明雪崩的发生是系统参数的函数.
- 确定了一个特定的子区域,用于预测雪崩前的球体提取的关键数量.
- 这项研究发现,在崩时存在着恒定的临界空隙分数,这意味着存在着临界包装分数.
结论:
- 在这个模型中,雪崩的触发在某些条件下是可以预测的.
- 平均协调数的演变是即将发生雪崩的关键指标.
- 这些发现有助于理解控制颗粒物质崩的基本原则.
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