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Volume 42 Issue 2
Feb.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(2): 211-217.
LIU Zhenguo, YA Jixuan, LIN Qiang, et al. Experimental analysis on micro-structure of three-dimensional full five-directional braided composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(2): 211-217. doi: 10.13700/j.bh.1001-5965.2015.0084(in Chinese)
Citation: LIU Zhenguo, YA Jixuan, LIN Qiang, et al. Experimental analysis on micro-structure of three-dimensional full five-directional braided composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(2): 211-217. doi: 10.13700/j.bh.1001-5965.2015.0084(in Chinese)
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Experimental analysis on micro-structure of three-dimensional full five-directional braided composites

doi: 10.13700/j.bh.1001-5965.2015.0084

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 06 Feb 2015
  • Publish Date: 20 Feb 2016
    Abstract
  • The micro-structure of three-dimensional (3D) full five-directional braided composite is investigated.Three-dimensional full five-directional braided composite is a new kind of braided composite. The micro-structure plays an important role in predicting performance of the material. Micro-computed tomography (micro-CT) is used to get the cross-section images of the three-dimensional full five-directional braided composites. Glass fiber as tracer yarns is mixed into the sample made of carbon fiber to improve its contrast in the images. The solid model of tracer yarns created by 3D reconstruction with these images is used to study the cross-sections and orientations of the fiber tows through CAD technology. The results show that the cross-sections of braiding yarns and axial yarns change with the regions and the heights in one pitch of the material; the spatial orientations of braiding yarns are not the same in different regions. The axial yarns are almost straightened in space. The surface of the axial yarns has helical indentation because of the extrusion of braiding yarns on axial yarns.

     

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