C/SIC复合材料结构动态特性研究

STUDY ON DYNAMIC CHARACTERISTICS OF C/SIC COMPOSITE STRUCTURE

针对C/SiC轻质复合材料结构,将三维编织C/SiC复合材料看作是组分材料的空间结构物,由有序的细观结构单胞叠合而成.采用细观结构单胞作为离散单元对三维编织复合材料结构进行宏观网格剖分,利用有限元方法研究复合材料悬臂板动态特性.计算结果与理论值符合较好.

This paper regarded the three-dimensionally carbon/silicon carbide braided composite as a spatial structure, which is made up of cell-elements and contains matrix and fiber. The structure model of a cell-element for the three-dimensionally multi-directionally braided composite was constituted geometrically and used for meshing the composite structure. Based on the cell model, we studied the dynamic behavior of the C/SiC composite cantilevered plate using finite element method. The theoretical dynamic behavior of the composite plate was also obtained and compared with the numerical result, which verified the correctness of the calculation model.