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拓性机械超材料用于坚固和柔性单向裂变

Xinyu Wang¹, Siddhartha Sarkar¹, Stefano Gonella²

¹Department of Physics, University of Michigan, Ann Arbor, MI, USA.

Nature communications

|February 6, 2026

概括

拓性机械超材料 (TMM) 通过单向引导裂,使易碎材料的可控,柔性破裂成为可能. 这一突破为增强材料可靠性和功能提供了可编程破裂解决方案.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
物理物理学物理

背景情况:

材料破裂是影响可靠性的关键故障机制.
控制易碎材料的裂传播仍然是一个重大挑战.
经典的断裂理论经常预测脆性失败,限制了材料设计.

研究的目的:

调查拓机械元材料 (TMM) 的使用,以控制裂的传播.
使用TMM来证明脆碎裂变为柔性事件的转化.
探索TMM在可编程破裂应用中的潜力.

主要方法:

使用具有独特拓性质的拓机械元材料 (TMM).
研究了在压力下TMM格子的机械反应.
分析了隙尖端的应力场和裂传播动态.
探索了极化软盘模式在骨折行为中的作用.

主要成果:

在TMM中证明了单向裂引导,导致可预测的断裂.
在TMM格子中观察到TMM格子中从脆性到软性骨折事件的过渡.
确定了不对称的应力场和极化软盘模式作为关键机制.
证实了断裂单向性的拓保护.

结论:

TMM为可编程和可伸缩裂纹提供了一种新的机制.
观察到的断裂单向性是一种强大的拓特征.
这种方法为各种材料和结构的断裂控制提供了多功能解决方案.

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