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Stretch-bend-hybrid hierarchical composite pyramidal lattice cores

机译：拉伸-弯曲-混合分层金字塔锥芯

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摘要

Hierarchical composite pyramidal lattice (CPL) cores with foam-core sandwich struts were designed, and two stacking patterns were fabricated and tested in out-of-plane compression. Analytical expressions for five possible failure modes were derived considering not only stretching and bending deformation but also shear deformation of struts. Core shear failure was absent from collapse mechanism maps for both Patterns-I and il CPL cores. Optimized Pattern-I hierarchical CPL cores were more efficient than Pattern-II cores. The following comparison with almost all competing composite sandwich cores revealed that the hierarchical CPL structures here, the assembly of both stretch- and bend-dominated constructions, could perform among the most efficient sandwich cores. Meanwhile, the construction concept can also enable multifunctionality by judicious selection of strut core materials without compromising structural efficiency.
机译：设计了带有泡沫芯夹心支柱的分层复合金字塔格网（CPL）芯，并制造了两个堆叠模式并在平面外压缩下进行了测试。不仅考虑了拉伸和弯曲变形，还考虑了杆的剪切变形，得出了五种可能的破坏模式的解析表达式。 Patterns-I和il CPL岩心的坍塌机制图都没有岩心剪切破坏。优化的Pattern-I分层CPL内核比Pattern-II内核更有效。以下与几乎所有竞争性复合夹芯的比较表明，此处的分层CPL结构（拉伸和弯曲为主的结构的组合）可以在最高效的夹芯中发挥作用。同时，该构造概念还可以通过在不损害结构效率的情况下明智地选择支撑芯材料来实现多功能。

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  • 来源
    《Composite Structures》 |2013年第4期|153-159|共7页
  • 作者

    Sha Yin; Linzhi Wu; Steven Nutt;

  • 作者单位

    Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China;

    Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China;

    Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-0241. USA;

  • 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

    carbon fibers; composite lattice; hierarchy; optimization; structural efficiency;

    机译：碳纤维复合晶格等级优化;结构效率;

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