Volume 30 Issue 1
Jan.  2015
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GONG Long-dong, SHEN Xiu-li. Mesoscopic modeling of three-dimensional four-directional braided composites using energy method[J]. Journal of Aerospace Power, 2015, 30(1): 106-113. doi: 10.13224/j.cnki.jasp.2015.01.015
Citation: GONG Long-dong, SHEN Xiu-li. Mesoscopic modeling of three-dimensional four-directional braided composites using energy method[J]. Journal of Aerospace Power, 2015, 30(1): 106-113. doi: 10.13224/j.cnki.jasp.2015.01.015

Mesoscopic modeling of three-dimensional four-directional braided composites using energy method

doi: 10.13224/j.cnki.jasp.2015.01.015
  • Received Date: 2013-08-23
  • Publish Date: 2015-01-28
  • Based on the motion rules of three-dimensional four-directional braiding yarn carriers and the interior fiber bundle's force analysis, a mesoscopic modeling approach using energy method was established, which divided the modeling process as follows: adjusting the control point after jamming of fiber bundle, changing the position of fiber bundle due to extrusion and interwinding to each other and establishing the fiber bundle trajectory according to the minimum strain energy. By analyzing the geometric dimension of unit cell model, the relationship between unit cell model and braided parameters was provided. The fiber bundle model established by this approach was not interfered but compacted, and the fiber bundle trajectory, composed of a space curve and two tangent lines, was almost a straight line. Compared with the experiment result, the fiber bundle trajectory and cross section of model are consistent with the electron microscope scan images, and braided structure size calculated is in agreement with the measured data. The maximum relative calculation error of pitch length is about 5%, especially when braided angle is 21 degree or so, the relative calculation error is below 2%.

     

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