Analytical model of elastic modulus and coefficient of thermal expansion for 2.5D C/SiC composite

作者：Kong Chunyuan; Sun Zhigang^*; Niu Xuming; Song Yingdong

来源：Journal of Wuhan University of Technology-Materials Science Edition, 2013, 28(3): 494-499.

DOI：10.1007/s11595-013-0719-0

• 2.5D C/SiC composites
• finite element model
• analytical model
• elastic modulus
• coefficient of thermal expansion

To make better use of 2.5D C/SiC composites in industry, it is necessary to understand the mechanical properties. A finite element model of 2.5D composites is established, by considering the fiber undulation and the porosity in 2.5D C/SiC composites. The fiber direction of warp is defined by cosine function to simulate the undulation of warp, and based on uniform strain assumption, analytical model of the elastic modulus and coefficient of thermal expansion (CTE) for 2.5D C/SiC composites were established by using dualscale model. The result is found to correlate reasonably well with the predicted results and experimental results. The parametric study also demonstrates the effects of the fiber volume fraction, distance of warp yarn, and porosity in micro-scale on the mechanical properties and the coefficients of thermal expansion.

• 出版日期2013-6
• 单位机械结构力学及控制国家重点实验室; 南京航空航天大学