在带有部分切割的曲梁中,歇斯底里式的裂口切断和多稳定性
Bernat Durà Faulí1,2, Lennard Kwakernaak1,2, Martin van Hecke1,2
1AMOLF, Science Park 104, 1098 XG Amsterdam, Netherlands.
Science advances
|February 13, 2026
概括
在柔性梁上添加部分切割精确控制弹性不稳定性,如曲和断裂. 这使得可编程的机械超材料具有先进的内存和顺序行为.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 物理 物理学 物理
背景情况:
- 弹性不稳定性,如曲和断裂,对于元材料和设备的高级功能至关重要.
- 目前的局限性存在于控制 postbuckling 配置和快速过渡,以扩展设计可能性.
研究的目的:
- 制定控制柔性梁的弹性不稳定性的一般原则.
- 为了研究部分切割 (裂) 对后行为的影响,并使可编程的机械反应.
主要方法:
- 在压缩下在柔性梁中引入部分切割 (裂).
- 使用架模型来分析几何和裂诱导的非线性性的相互作用.
- 设计和制造多梁以实现可编程行为.
主要成果:
- 裂梁表现出受控的曲和断裂,导致三度稳定性.
- 一个木架模型成功地解释了观察到的现象.
- 多裂梁表现出可编程的行为,包括巨型歇斯底里,四方稳定性和多步骤切断.
结论:
- 部分削减为精确控制弹性不稳定性提供了一个一般的,简单的策略.
- 这种方法为具有先进的内存和顺序能力的机械超材料开辟了广的设计空间.
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