粒子角性对颗粒的自我组织的影响
Dominik Krengel1, Haoran Jiang2, Takashi Matsushima3
1Tokyo University of Marine Science and Technology, Department of Marine Resources and Energy, 4-5-7, Konan, Minato 108-8477, Tokyo, Japan.
Physical review. E
|December 23, 2025
概括
粒子角性不会影响2D系统中的自我组织,但增加角性使应力分布对摩擦敏感. 这影响了对颗粒物质和细胞力学的理解.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 计算建模 计算建模
背景情况:
- 二维多散盘系统表现出细胞应力和形状的协调自我组织.
- 分布通常会在尺寸,摩擦和顺序等各种参数上崩成一个主形式.
- 粒子形状,特别是角度对这些自我组织现象的影响需要进一步研究.
研究的目的:
- 研究粒子角性对二维颗粒系统中自我组织指标的影响.
- 系统地改变粒子的角性 (常规N-gons) 并评估其对应力导向相关性和应力比率分布的影响.
- 为了确定观察到的自我组织现象是否在不同的粒子形状和摩擦系数中具有稳定性.
主要方法:
- 利用了由正规N多边形组成的双分散系统的计算模拟.
- 系统地改变了多边形的边数 (N),以表示增加的角度.
- 分析了局部细胞应力,细胞定向,以及缩放细胞应力比率的条件分布.
主要成果:
- 当地细胞应力和方向之间的强相关性是独立于粒子角和摩擦系数.
- 缩放细胞应力比率的有条件分布对所有粒子顺序 (k) 倒塌为主维布尔形式,不论角和摩擦.
- 粒子角度的增加使得条件分布的崩对摩擦系数的变化敏感.
结论:
- 在2D颗粒系统中,压力和形状的基本自我组织,以主分布崩为特征,在很大程度上独立于粒子角度和摩擦.
- 然而,这些分布对摩擦的敏感性会随着粒子的角度增加而崩,这表明在更高的角度下有更复杂的相互作用.
- 这些发现有助于理解颗粒材料和软物质系统的机制,其中粒子形状起着至关重要的作用.
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