Volume 26 Issue 11
Nov.  2011
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KONG Chun-yuan, SUN Zhi-gang, GAO Xi-guang, SONG Ying-dong. Unit cell of 2.5 dimension C/SiC and its stiffness prediction[J]. Journal of Aerospace Power, 2011, 26(11): 2459-2467.
Citation: KONG Chun-yuan, SUN Zhi-gang, GAO Xi-guang, SONG Ying-dong. Unit cell of 2.5 dimension C/SiC and its stiffness prediction[J]. Journal of Aerospace Power, 2011, 26(11): 2459-2467.

Unit cell of 2.5 dimension C/SiC and its stiffness prediction

  • Received Date: 2010-12-14
  • Rev Recd Date: 2011-09-01
  • Publish Date: 2011-11-28
  • A kind of unit cell for 2.5 dimension C/SiC composites was established by extracting the boundary of warp,fitting the curve using robust least square and simplifying the fitted curve.The elastic properties of 2.5 dimension C/SiC composites were predicted using dual-scale model;the dual-scale model was micro-scale which considered the scale of matrix/fiber/pore,and also meso-scale which considered the scale of warp/weft/cavity.The method for predicting the elastic properties of 2.5 dimension C/SiC composites was stiffness average method and energy method;finally the relationship between the porosity in the micro-scale and the elastic properties of 2.5 dimension C/SiC composites was discussed.Numerical results show that the theoretical results using energy method and stiffness average method have little difference;when considering the micro-scale porosity,the theoretical results can fit the experimental results better.

     

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