CVI工艺陶瓷基编织复合材料疲劳寿命预估  

Fatigue life prediction for ceramic matrix composite fabricated by CVI process

作　　者：彭芳[1] 王奇志[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《强度与环境》2016年第3期1-8,共8页Structure & Environment Engineering

基　　金：国家重大基础研究项目

摘　　要：为研究陶瓷基编织复合材料的疲劳性能,从细观层面出发,提出了一种CVI工艺制造的C/SiC陶瓷基平纹编织复合材料细观单胞简化模型,对宏细观关联规律进行了探讨,建立考虑细观结构及性能的宏观损伤演化方程,并利用材料标准实验件实验数据对损伤演化方程参数进行拟合。最终对材料刚度及疲劳损伤寿命进行了预估并与实验结果进行对比。In order to research the fatigue properties of ceramic matrix composites, the paper proposes a simplified unit cell model for the advanced C/SiC ceramic matrix composites fabricated by CVI process. Based on the mesoseopie level, the principle of correlation of macroscopic and mesoscopic is studied. In addition, the macroscopic damage evolution equation is set up considering of the mesoscopic structure and the mesoscopic performance of ceramic matrix. Then the experimental data of standard test pieces can be used to obtain the parameters in damage evolution equation. Finally, the fatigue life and stiflhess of ceramic matrix composites has carried on the forecast which illustrate the effectiveness of the equation proposed in this paper comparing with the experimental results.

关 键 词：C/SIC 平纹编织 细观模型 疲劳寿命 损伤演化 

分 类 号：O346.5[理学—固体力学]