Z向缝合增强CC复合材料在低能冲击下的损伤研究.pdf

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Z 向缝合增强 C/C 复合材料在低能冲击下的损伤研究*
韩红梅 1 李贺军 1 岳珠峰 2 李克智 1
(1. 西北工业大学碳/碳复合材料工程技术研究中心陕西西安 710072;
2. 西北工业大学力学工程系陕西西安 710072)

摘要利用低能落锤冲击实验对炭/炭 C/C 层压复合材料的损伤进行了研究并通过冲击后
剩余压缩强度 CAI 分析了材料的损伤容限实验结果表明 C/C 层压复合材料在低能冲击条
件下主要以分层形式破坏且分层降低了材料的剩余强度 C/C 层压复合材料在 Z 方向缝合增强
后分层扩展受到增强纤维的抑制损伤容限大幅提高与未增强的材料相比材料剩余承载能
力提高两倍以上
关键词炭/炭复合材料冲击损伤剩余压缩强度

Damage behaviors of C/C laminates reinforced in Z-direction
under the low-energy impact
HAN Hong-mei, LI He-jun, YUE Zhu-feng, LI Ke-zhi
(Northwestern Polytechnical University, Xi’an, China, 710072)
Abstract The low-energy impacts were carried out to provide some insights into the impact damage
behavior of C/C laminates. The macroscopic failure mode and the internal damage were investigated
for the C/C laminate specimens with and without through-the-thickness stitching. The results indicated
that the C/C laminates failed in delamination, which degraded the residual strength, under low-energy
impact. Through-the-thickness stitching interrupted delamination propagation and produced the much
higher damage tolerance. Specifically, the residual strength of C/C laminates, defined as the ratio of
compression-after-impact strength (CAI) to pression strength, was increased by more than
two times due to stitching.
Keywords: Carbon/posites; Scanning electronic microscopy; Mechanical properties

1. 前言
炭/炭