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Modeling and in situ identification of material parameters for layered structures based on carbon nanotube arrays

机译：基于碳纳米管阵列的层状结构材料参数建模与现场识别

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摘要

We test and model the mechanical response of a multilayer composite structure composed of alternating layers of aligned carbon nanotubes and copper foils under compression. We employ a bistable mass-spring model to capture the three-phase hysteretic response of the loading curve with excellent agreement with the experimental observations. An in situ identification procedure is proposed to quantify the material parameters corresponding to the mesoscopic scale of the structure. We refine the results using a genetic algorithm and compare the response of two different models based on three and four springs in series. The localization of deformation can be accurately captured by these simplified models, which hold promise for the design of novel materials with tailored deformation responses.
机译：我们测试并建模了多层复合结构的机械响应，该复合结构由压缩的定向碳纳米管和铜箔的交替层组成。我们采用双稳态质量弹簧模型来捕获载荷曲线的三相滞后响应，并与实验观察结果非常吻合。提出了一种原位识别程序来量化与结构的介观尺度相对应的材料参数。我们使用遗传算法完善结果，并基于串联的三个和四个弹簧比较两个不同模型的响应。这些简化的模型可以准确地捕获变形的局部性，这为具有定制的变形响应的新型材料设计提供了希望。

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  • 来源
    《Composite Structures》 |2011年第11期|p.3013-3018|共6页
  • 作者

    J.R. Raney; F. Fratemali; A. Amendola; C. Daraio;

  • 作者单位

    Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA;

    Department of Civil Engineering, University of Salerno, 84084 Fisciano, SA, Italy,Division of Engineering, King's College London, Strand, London WC2R 2LS, UK;

    Department of Civil Engineering, University of Salerno, 84084 Fisciano, SA, Italy;

    Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, 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 nanotubes; multilayer foams; buckling; mechanical properties;

    机译：碳纳米管;多层泡沫;屈曲;力学性能;

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