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相关概念视频

Cell-matrix's Response to Mechanical Forces01:13

Cell-matrix's Response to Mechanical Forces

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
Anchoring junctions mechanically attach a cell to the...
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Fabricating Metamaterials Using the Fiber Drawing Method
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Fabricating Metamaterials Using the Fiber Drawing Method

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灵感来自双网络的机械超材料.

James Utama Surjadi1, Bastien F G Aymon1, Molly Carton1,2

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Nature materials
|April 24, 2025
PubMed
概括

这项研究引入了新的双网络启发的超材料,可以克服刚性-柔性权衡. 这些先进材料具有显著增强的刚性和伸展性,为新的高合规性机械设计铺平了道路.

科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 聚合物科学 聚合物科学

背景情况:

  • 机械超材料往往面临着高刚性/强度和低柔性/伸展性之间的权衡.
  • 双网水凝提供高刚性和伸展性的独特组合,从而产生出色的性.

研究的目的:

  • 开发双网络启发的超材料,将刚性和合规组件集成在一起.
  • 在元材料中实现前所未有的刚性和伸展性的组合.
  • 探索这些新型材料中增强的能量消散机制.

主要方法:

  • 整合单体结构 (刚性) 和织物 (符合) 组件到一个元材料架构中.
  • 非线性计算力学建模以阐明能量消散机制.
  • 引入内部缺陷以研究它们对机械性能和能量消耗的影响.

主要成果:

  • 与纯单体或织物对应物相比,实现了十倍的刚性和伸展性.
  • 计算模型显示,由于相互透的网络的摩擦消散,能量消散的增强.
  • 通过引入缺陷来证明能量消耗增加了三倍,这归因于故障移位.

结论:

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  • 开发的双网络启发的超材料成功地克服了刚性-柔性权衡.
  • 相互透的网络设计通过摩擦和故障移位来增强能量消耗.
  • 这种方法为设计灵感来自聚合物网络拓学的高合规元材料开辟了新的可能性.