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Stiff, strong, zero thermal expansion lattices via material hierarchy

机译：通过材料层次结构实现刚性强的零热膨胀晶格

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摘要

For engineering applications where tight dimensional tolerances are required, or for applications where materials are subjected to a wide range of temperatures it becomes desirable to reduce a material's coefficient of thermal expansion. By carefully designing lattice microstructures, zero thermal expansion can be achieved. This work describes lattice microstructures that achieve zero expansion by utilizing either the Poisson effect to negate thermal expansion, or a curved, bi-material rib morphology. Previously described microstructures were composed of solid material constituents. The lattices presented here have structural hierarchy in which lattice ribs contain oriented porosity. This gives rise to improved strength and modulus, and provides additional design freedom associated with anisotropy.
机译：对于要求严格的尺寸公差的工程应用，或者对于材料要经受很宽温度范围的应用而言，减小材料的热膨胀系数变得很必要。通过仔细设计晶格微结构，可以实现零热膨胀。这项工作描述了通过利用泊松效应抵消热膨胀或弯曲的双材料肋形态来实现零膨胀的晶格微结构。先前描述的微结构由固体材料成分组成。这里介绍的晶格具有结构层次，其中晶格肋包含定向的孔隙度。这带来了改进的强度和模量，并提供了与各向异性有关的附加设计自由度。

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  • 来源
    《Composite Structures》 |2014年第1期|654-663|共10页
  • 作者

    Jeremy Lehman; Roderic S Lakes;

  • 作者单位

    Department of Engineering Physics, Department and Rheology Research Center, University of Wisconsin-Madison, 212 Engineering Research Building, 1500 Engineering Drive, Madison, WI 53706-1687, United States;

    Department of Engineering Physics, Materials Science Department and Rheology Research Center, University of Wisconsin-Madison, 212 Engineering Research Building, 1500 Engineering Drive, Madison. WI 53706-1687, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Zero thermal expansion; Hierarchical lattice structure; Mechanical properties; Stiffness optimization;

    机译：零热膨胀;分层晶格结构;机械性能刚度优化;

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