Research on the influence of fiber mesostructure on the comprehensive mechanical properties of SiC/SiC composites

doi:10.19936/j.cnki.2096-8000.20250728.006

Abstract

Abstract: The comprehensive mechanical properties and failure modes of SiC/SiC composites are closely related to the mesostructure of the fiber preform. This article is based on the multi-scale analysis method of composite, conducting multi-scale unit cell modeling, combined with progressive damage analysis, to analyze and predict the mechanical properties of fiber bundles and woven composites, and comparing them with bending test results to verify the correctness of the multi-scale analysis method and component constitutive model. Further analysis was conducted on the influence of fiber weaving structure and layup angle on the macroscopic comprehensive mechanical properties of two-dimensional SiC/SiC composites. The calculation results showed that under the same fiber volume fraction conditions, fiber mesostructures had little effect on the elastic modulus of the composite, but had a significant impact on the failure strength. The fiber weaving structure mainly affected the in-plane direction tensile strength, and the twill structure was about 30% higher than the plain structure; the angle of fabric layering has a significant impact on the tensile and shear strength in the in-plane direction. The in-plane tensile strength of the 0° layering structure is about 85% higher than that of the 45° layering structure, while the in-plane shear strength is about 30% lower; in addition, the weaving structure and ply angle have almost no effect on the interlayer shear strength, which is mainly determined by the interlayer reinforcing fibers and the interlayer matrix porosity. The results of this article can provide support for the design of fiber preform structures in the development of SiC/SiC composite components.

Key words: SiC/SiC composites, two dimensional layering, fiber mesostructure, comprehensive mechanical properties, simulation

CLC Number:

TB332

MEI Wenbin, XU Shenwei, FU Zeyu, CHEN Huan. Research on the influence of fiber mesostructure on the comprehensive mechanical properties of SiC/SiC composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(7): 41-48.

References

[1] 刘巧沐, 黄顺洲, 何爱杰. 碳化硅陶瓷基复合材料在航空发动机上的应用需求及挑战[J]. 材料工程, 2019, 47(2): 1-10.
[2] 杨金华, 董禹飞, 杨瑞, 等. 航空发动机用陶瓷基复合材料研究进展[J]. 航空动力, 2021(5): 56-59.
[3] 齐哲, 郎旭东, 赵春玲, 等. SiC/SiC复合材料失效行为研究进展[J]. 航空材料学报, 2021, 41(3): 25-35.
[4] 刘虎, 杨金华, 焦健. 航空发动机用连续 SiC_f/SiC复合材料制备工艺及应用前景[J]. 航空制造技术, 2017, 60(16): 90-95.
[5] 陶然, 贺春旺, 罗俊荣, 等. 复合材料构件设计理论及仿真研究进展[J]. 中国工程科学, 2023, 25(1): 121-130.
[6] 郭洪宝. 平纹编织陶瓷基复合材料损伤耦合机理研究[D]. 西安: 西北工业大学, 2016.
[7] 王赛. 陶瓷基复合材料涡轮转子叶片的宏细观结构设计[D]. 南京: 南京航空航天大学, 2019.
[8] 谭僖, 刘伟, 曹腊梅, 等. 不同纤维预制体结构对SiC_f/PyC/SiBCN复合材料力学性能的影响[J]. 航空材料学报, 2017, 37(4): 45-51.
[9] 李俊. 二维C/SiC复合材料的非线性本构关系研究[D]. 西安: 西北工业大学, 2014.
[10] GUO H B, JIA P R, WANG B, et al. Characterisation and analysis of the damage coupling effects of a 2D-C/SiC composite under proportional loading conditions[J]. Ceramics International, 2016, 42(1): 1007-1014.
[11] 唐瑞涛, 徐柳云, 文鹤鸣, 等. 陶瓷材料宏观动态新本构模型[J]. 高压物理学报, 2020, 34(4): 89-99.
[12] WANG Q Z, LIN H X, XU Y Q. Mechanical properties prediction of 2D braided ceramic matrix composites under off-axial tension[J]. Acta Materiae Compositae Sinica, 2018, 35(12): 3423-3432.
[13] 齐泽文, 胡殿印, 张龙, 等. 含孔隙三维四向编织复合材料力学性能的双尺度分析[J]. 推进技术, 2018, 39(8): 1873-1879.
[14] HUI X, XU Y, HOU Y. A coupled micro-meso-scale study on the damage mechanism of 2D SiC/SiC ceramic matrix composites[J]. Mechanics of Advanced Materials and Structures, 2021, 28(20): 2083-2095.
[15] 李尧, 王晓辉, 刘宝瑞, 等. 界面韧性对C/SiC材料拉伸强度影响分析[J]. 强度与环境, 2023, 50(5): 19-27.
[16] WANG R, HAN J, MAO J, et al. A molecular dynamics based cohesive zone model for interface failure under monotonic tension of 3D four direction SiC_f/SiC composites[J]. Composite Structures, 2021, 274: 114397.
[17] PAN Q. Multi-scale modeling and material characterization of textile composites for aerospace applications[D]. Nottingham: The University of Nottingham, 2016.
[18] 胡殿印, 曾雨琪, 张龙, 等. 二维编织SiC/SiC陶瓷基复合材料宏观弹性常数预测及模态试验研究[J]. 推进技术, 2018, 39(2): 465-472.