在颗粒状固体中,四极非亲缘移位场的粒子尺度起源
Evan P Willmarth1, Weiwei Jin1, Dong Wang1
1Yale University, Department of Mechanical Engineering, New Haven, Connecticut 06520, USA.
Physical review. E
|December 23, 2025
概括
堵塞的磁盘包装中的结构缺陷会产生非关联位移场. 打破特定的粒子间接触,与振动模式保持一致,导致有效的四极,可以由Eshelby解释.
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:
- 堵塞的磁盘包装在剪切下表现出复杂的非非的位移场.
- 了解这些领域对于预测材料行为至关重要.
研究的目的:
- 确定局部结构缺陷,控制非亲属位移.
- 研究切割堵塞磁盘系统中有效四极体的出现.
主要方法:
- 无热,准静态的简单剪切模拟.
- 适用于离散包装的埃舍尔比等效包含方法 (EIM).
- 德劳内三角测定用于局部刚度分析.
主要成果:
- 孤立的有效四极体随着压力增加而出现.
- 与粒子间接触断裂相关的四极形成与低频振动模式保持一致.
- 作为离散的Eshelby-like缺陷的总和重建的Nonaffine字段.
结论:
- 局部结构缺陷,特别是断裂的接触,决定了非非的行为.
- 类似埃舍尔比的缺陷为了解颗粒材料的剪切反应提供了一个框架.
- 压力会影响四极缺陷的发生率.
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