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考虑孔隙的三维编织陶瓷基复合材料弹性常数预测方法

石多奇 牛宏伟 景鑫 周新贵 杨晓光

石多奇, 牛宏伟, 景鑫, 周新贵, 杨晓光. 考虑孔隙的三维编织陶瓷基复合材料弹性常数预测方法[J]. 航空动力学报, 2014, 29(12): 2891-2897. doi: 10.13224/j.cnki.jasp.2014.12.015
引用本文: 石多奇, 牛宏伟, 景鑫, 周新贵, 杨晓光. 考虑孔隙的三维编织陶瓷基复合材料弹性常数预测方法[J]. 航空动力学报, 2014, 29(12): 2891-2897. doi: 10.13224/j.cnki.jasp.2014.12.015
SHI Duo-qi, NIU Hong-wei, JING Xin, ZHOU Xin-gui, YANG Xiao-guang. Prediction method of elastic constants of 3-D braided ceramic matrix composites considering pores[J]. Journal of Aerospace Power, 2014, 29(12): 2891-2897. doi: 10.13224/j.cnki.jasp.2014.12.015
Citation: SHI Duo-qi, NIU Hong-wei, JING Xin, ZHOU Xin-gui, YANG Xiao-guang. Prediction method of elastic constants of 3-D braided ceramic matrix composites considering pores[J]. Journal of Aerospace Power, 2014, 29(12): 2891-2897. doi: 10.13224/j.cnki.jasp.2014.12.015

考虑孔隙的三维编织陶瓷基复合材料弹性常数预测方法

doi: 10.13224/j.cnki.jasp.2014.12.015
详细信息
    作者简介:

    石多奇(1975-), 男, 内蒙古临河人, 教授、博士生导师, 博士, 主要研究方向为航空宇航高温结构完整性.

  • 中图分类号: V235.13

Prediction method of elastic constants of 3-D braided ceramic matrix composites considering pores

  • 摘要: 提出了利用气孔单元并考虑基体孔隙随机分布来预测三维编织陶瓷基复合材料弹性常数的方法.通过工业computed tomography(CT)扫描技术测得孔隙率,在胞元模型中利用Monte-Carlo仿真技术在基体上随机投入气孔单元来模拟三维编织陶瓷基复合材料中的孔隙,利用胞元有限元模型计算了孔隙率对三维编织陶瓷基复合材料弹性常数的影响规律.结果表明:①孔隙率对三维编织陶瓷基复合材料弹性常数具有明显的影响;②对给定的孔隙率,孔隙的位置分布对沿纤维束方向弹性模量的影响较小;③随着孔隙率增加,沿纤维束方向弹性模量降低.同时,开展了SiC/SiC复合材料的室温拉伸试验,弹性模量计算值和试验结果吻合较好,表明该方法可以用来预测含孔隙的三维编织陶瓷基复合材料的弹性常数.

     

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出版历程
  • 收稿日期:  2013-08-07
  • 刊出日期:  2014-12-28

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