Volume 32 Issue 04
Apr.  2006
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Lu Zixing, Liu Zixian. Elastic properties for 3 dimensional and 5 directional braided composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(04): 455-460. (in Chinese)
Citation: Lu Zixing, Liu Zixian. Elastic properties for 3 dimensional and 5 directional braided composites[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(04): 455-460. (in Chinese)

Elastic properties for 3 dimensional and 5 directional braided composites

  • Received Date: 31 Jan 2005
  • Publish Date: 30 Apr 2006
  • According to actual braiding process and the micro-structural model of braiding preform, using stiffness averaging method, the stiffness matrix of 3D&5D(3 dimensional and 5 directional) braided composites is deduced and their elastic properties are calculated. On the basis of calculation,the changing characteristics of elastic constants with the braided angle and volume fraction of fibers is described and the difference of elastic properties between 3D&5D and 3D&4D(3 dimensional and 4 directional) braided composites as well as the effect of cross-section size of performs are discussed. Numerical calculation showsthat 3D&5D braided composites not only keep the certain merits of 3D&4D braided composites but also enhance the mechanical properties of axial direction or braided direction. The effect of cross-section size of braiding preform on the elastic properties of braided composites is larger only if the cross-section size is smaller.

     

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