超软磁铁质弹性体中的磁性驱动粘性机制提供历史依赖的启动,具有可重编程选项
Ernesto Gonzalez-Saiz1, Maria Luisa Lopez-Donaire1, Lucía Gutiérrez2
1Department of Continuum Mechanics and Structural Analysis, Universidad Carlos III de Madrid, Calle Butarque 15, Leganes, 28911, Madrid, Spain.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 13, 2025
概括
软磁性弹性体 (MREs) 由于磁作用而表现出改变的粘性弹性. 磁场下的微观结构变化使得这些软材料中的可调节的力记忆效应成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 软物质物理学 软物质物理学
- 材料机械学 材料机械学
背景情况:
- 磁铁质弹性体 (MRE) 是智能材料,其性能因磁场的影响而改变.
- 对于先进的应用来说,了解柔软的MRE中的磁性驱动和粘弹性行为之间的相互作用至关重要.
研究的目的:
- 阐明软MRE中的微观结构重组如何影响磁性启动期间的粘弹性行为.
- 探索通过磁性刺激诱导和控制MRE中的力-记忆效应的潜力.
主要方法:
- 在磁力驱动下对机械限制和非常柔软的MRE进行实验研究.
- 分析粘弹性反应,包括放松时间,在不同的磁场振幅和执行速率下.
- 开发一个理论磁力机械连续模型,以了解底层机制.
主要成果:
- 与纯粹机械效应相比,磁性驱动显著增加了MRE放松时间 (数量级).
- 粘性响应调制可通过磁性刺激特征调节,并与粒子微观结构重排联系在一起.
- 磁力驱动的产量和力-记忆效应被诱导,然后通过移除磁场来擦除.
结论:
- 微观结构的重组是调节软MRE在磁场下的粘性弹性的关键.
- 磁性驱动为设计具有可调节的力存储能力的材料提供了一条新的途径.
- 这些发现为新的软传感器执行器和储计算系统铺平了道路.
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