Compressive behavior of C/SiC composite sandwich structure with stitched lattice core
Compressive behavior of C/SiC composite sandwich structure with stitched lattice core
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缝合晶格芯C/SiC复合材料夹层结构的压缩行为
DOI：
10.1016/j.compositesb.2014.10.012
复制
发表时间：
2015-02
期刊：
影响因子：
--
通讯作者：
Dai-ning Fang
中科院分区：
文献类型：
--
作者：
Ze-zhi Song;Su Cheng;Tao Zeng;Fan Yang;Shao-dong Jing;Dai-ning Fang
采用聚合物浸渍与交织相结合的方法制备了缝合晶格芯层的C/SiC复合材料夹层结构。研究了碳/碳化硅复合材料夹层结构的室温力学行为。面外抗压强度为20.97×10~(-6)Mpa，弹性模量为1473.55×10~(-6)Mpa。用扫描电子显微镜研究了缝合纱线在压缩断口表面的微观组织演变，提出并讨论了纤维在压缩断口的损伤模式。在面内压缩载荷作用下，碳/碳化硅复合材料夹层结构在破坏前表现为线弹性行为。峰值强度为165.61 Mpa，平均弹性模数为19.74 Gpa。试件的破坏以面板断裂为主。
C/SiC composite sandwich structure with stitched lattice core was fabricated by a technique that involved polymer impregnation and interweaving. The mechanical behaviors of C/SiC composite sandwich structure were investigated at room temperature. The out-of-plane compressive strength was 20.97 MPa while modulus was 1473.55 MPa. The microstructural evolution on compression fracture surfaces of the stitching yarns was investigated by scanning electron microscopy, and the damage pattern of fibers on compression fracture surface was presented and discussed. Under an in-plane compression loading, the C/SiC composite sandwich structure displayed a linear-elastic behavior until failure. The peak strength and average modulus are 165.61 MPa and 19.74 GPa, respectively. The failure of the specimen was dominated by the fracture of the facesheet.
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