强力网络在颗粒状物质中入侵者的棒滑运动期间的演变:从实验数据中提取的拓测量
Rituparna Basak1, Ryan Kozlowski2, Luis A Pugnaloni3
1Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
Physical review. E
|December 20, 2023
概括
颗粒状材料在入侵者移动时表现出粘滑动态. 强力网络在粘合过程中以非碎的方式演变,通过对粒子应变网络的拓分析确定了滑动的前体.
科学领域:
- 软物质物理学 软物质物理学
- 颗粒力学 颗粒力学
- 复杂的系统复杂的系统.
背景情况:
- 几乎二维的颗粒系统与光弹性颗粒被限制在一个圆环表现出复杂的行为.
- 一个以圆形路径移动的入侵者经历了粘滑动力学,这是颗粒状材料中常见的现象.
研究的目的:
- 在入侵者诱导的stick-slip动态的粘合阶段,研究颗粒介质内的力网络的演变.
- 通过分析力网的拓性质来识别滑动事件的前体.
主要方法:
- 使用来自环状封闭中的光弹性颗粒的实验数据.
- 构建基于对单个粒子的综合应变大小测量的力网络.
- 使用持久性图表和相关措施分析网络拓.
主要成果:
- 强力网络在粘合期间演变平稳而又非碎,即使粒子是静止的.
- 持久性图的拓特征揭示了可识别的滑动前体.
- 发电机数量的增加,表明网络复杂性,始终在滑动事件之前.
结论:
- 基于应变的网络的拓分析为颗粒力网络的演变和滑动预测提供了洞察力.
- 虽然磁盘和五角形粒子表现出类似的动态,但五角形系统在网络尺度上表现出更大的波动.
- 这项研究证明了持久性图的实用性,用于理解颗粒介质中复杂的力量网络动态.
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