基里加米灵感的三维超材料具有可编程的同位热和正位热膨胀
Yuanqing Gu1, Zhibo Wei1, Guowu Wei2
1School of Mechanical Engineering, Tianjin University, Tianjin, 300350, China.
Advanced materials (Deerfield Beach, Fla.)
|October 22, 2024
概括
研究人员使用kirigami多面体开发了新的3D机械超材料. 这些材料提供可编程的负,零和正热膨胀在超宽范围的先进应用.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 纳米技术 纳米技术
背景情况:
- 现有的热膨胀元材料具有有限的细胞拓和变形范围,特别是在3D中.
- 在3D中实现可调整的负,零或正热膨胀 (NTE/ZTE/PTE) 是一个挑战.
研究的目的:
- 开发具有可编程热膨胀的3D同otropic 和 orthotropic 机械超材料.
- 通过使用一种新的动力设计策略,在超宽范围内实现NTE,PTE和ZTE.
主要方法:
- 使用了一级自由度的kirigami多面体与动态设计策略.
- 嵌入的双材料条纹用于同位体多面体和多种几何参数用于正位体设计.
主要成果:
- 设计和编程的超材料具有从-2354.3到3006.7 ppm/°C的热膨胀系数 (CTEs).
- 通过同质或混合型地板结构实现异型ZTE元材料.
- 开发了具有独立可编程的热膨胀在三个直角方向的正极形元材料.
结论:
- 这项研究为创造先进的热膨胀元材料提供了一条新的途径.
- 开发的超材料在太空光学系统,MEMS和其他需要精确热管理的领域都有潜在的应用.
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