Analytical Model of Elastic Modulus and Coefficient of Thermal Expansion for 2.5D C/SiC Composite
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第3期
论文作者：孔春元 孙志刚 NIU Xuming SONG Yingdong
文章页码：494 - 499
摘 要：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.
孔春元，孙志刚，NIU Xuming，SONG Yingdong
College of Energy and Power Engineering and State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics
摘 要：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.
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