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Nacre-inspired design of CFRP composite for improved energy absorption properties

机译：以珍珠层为灵感的CFRP复合材料设计可改善能量吸收性能

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摘要

AbstractDiscontinuous unidirectional fiber-reinforced composites are shown to possibly exhibit pseudo-ductile failure that is lacking in continuous fiber composites. The aim of this paper is to use a discontinuous and interdigitated design strategy which mimicks the nacre structure to improve the specific energy absorption (SEA) of a carbon/expoxy composite tube. Quasi-static axial compressive experiment is combined with a digital image correlation system to analyze the failure process of the specimens. Four kinds of tubular specimens which are based on different ply cut intervals and distributions are fabricated and crushed. The load-crushed displacement curves and the SEA values are obtained showing that circular shaped continuous ply cuts result is the highest fluctuation of the compressive force. Moreover, the tubes with helical and nacre mimicking ply cut structures result in a flatter load-crushed displacement curve. This work demonstrates that in a crush process, unidirectional composites with a well-designed discontinuity at the ply level can improve the SEA over 51% as compared to the unidirectional continuous tubes.
机译： 摘要 不连续的单向纤维增强复合材料可能表现出连续纤维复合材料所缺乏的假延性破坏。本文的目的是使用一种不连续且相互交叉的设计策略，该策略可以模仿珍珠质结构，从而改善碳/环氧复合管的比能吸收（SEA）。准静态轴向压缩实验与数字图像相关系统相结合，以分析试样的破坏过程。制作并粉碎了基于不同的层切割间隔和分布的四种管状标本。获得的压碎位移曲线和SEA值表明，圆形连续层切割结果是压缩力的最大波动。此外，具有螺旋状和珍珠质状的模拟层切割结构的管会产生更平坦的载荷破碎位移曲线。这项工作表明，在压碎过程中，与单向连续管相比，在层级设计良好的不连续性的单向复合材料可以将SEA提高51％以上。

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  • 来源
    《Composite Structures》 |2018年第1期|102-109|共8页
  • 作者

    Zhibo Xin; Xiaohui Zhang; Yugang Duan; Wu Xu;

  • 作者单位

    School of Mechanical Engineering, State Key Lab for Manufacturing Systems Engineering, Xi'an Jiaotong University;

    School of Mechanical Engineering, State Key Lab for Manufacturing Systems Engineering, Xi'an Jiaotong University;

    School of Mechanical Engineering, State Key Lab for Manufacturing Systems Engineering, Xi'an Jiaotong University;

    School of Aeronautics and Astronautics, Shanghai Jiao Tong University;

  • 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

    Composite; Nacre; Energy absorption; SEA composite design;

    机译：复合材料;珍珠母;能量吸收;SEA复合材料设计;

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