C/C-SiC机织复合材料尺度参数对力学性能的影响

Effects of different scale parameters on effective modulus of woven C/C-SiC composites

针对C/C-SiC纤维机织复合材料的特点,建立了C/C-SiC微结构有限元模型,并结合能量法研究了不同微结构关联参数对C/C-SiC机织复合材料宏观力学性能的影响。研究结果表明:本文中提出的C/C-SiC微结构有限元模型能够有效地反映C/C-SiC复合材料尺度关联参数对C/C-SiC力学性能的影响,纤维丝尺度的各个参数主要与C/C-SiC纤维束的力学性能相关联;纤维束尺度的各个参数主要与C/C-SiC宏观构件的整体性能相关联。

A finite element model of C/C-SiC microstructure characterizing different scale parameters was established for the woven C/C-SiC composites.The strain energy method was used to study the effects of relevant parameters of the microstructure on the macroscopic performances of C/C-SiC composites.The numerical computing results were compared for many cases of C/C-SiC composites with different scale parameters.It is shown that the elastic properties of C/C-SiC composites are associated with the scale parameters identified in the C/C-SiC composites.The effective moduli agree reasonably with the experimental ones.