在摩擦粒状介质中复杂的记忆形成
1Physics Department, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA.
Physical review letters
|July 14, 2023
概括
软的摩擦粒可以在压缩过程中存储剪切波形,并在解压时以相反的顺序召回它们. 在颗粒状材料中,这种记忆效应取决于摩擦,并且可能出现在其他压缩随机介质中.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 复杂的系统复杂的系统.
背景情况:
- 随机包装的颗粒物质在压力下表现出复杂的行为.
- 摩擦在颗粒系统的机械性质中起着至关重要的作用.
研究的目的:
- 为了研究软摩擦颗粒包装的记忆能力.
- 为了确定任意波形是否可以在这些系统中存储和回忆.
主要方法:
- 在压缩和解压缩下软摩擦粒的数值模拟.
- 时间依赖切割作为输入波形的应用.
- 对系统边界的回忆切割应力的分析.
主要成果:
- 一个堵塞的,随机的软摩擦粒包可以存储随意的波形,在压缩过程中作为剪切应用.
- 存储的波形被回忆在时间反向的顺序,作为压缩时的剪切应力.
- 记忆效应取决于谷物间的摩擦.
结论:
- 软摩擦颗粒系统拥有某种形式的内存,可以存储和回忆应用的波形.
- 这种现象与摩擦有关,并且可能存在于其他压缩随机介质中.
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