碳纤维复合材料的压缩响应的微观分析  

Microscopic Analysis of Compression Response of Carbon Fiber Composites

作　　者：吕超 李锋[1] 孙新杨[2] LV Chao;LI Feng;SUN Xinyang(China Academy of Aerospace Aerodynamics,Beijing 100074,China;School of Aeronautics and Astronautics,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国航天空气动力技术研究院,北京100074 [2]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《材料开发与应用》2021年第2期26-34,共9页Development and Application of Materials

摘　　要：设计了实验平台,对纤维压缩应变与电阻间灵敏系数进行了标定,将标定后的纤维制作成单丝和多丝复合材料体系压缩试验件。在压缩载荷条件下,通过电阻测量,揭示了多丝复合材料体系纤维断裂对周围纤维的影响规律,并准确测量出纤维发生压缩破坏时的最大变形量;利用数值方法模拟了断口处基体应力分布导致附近纤维微屈曲的损伤过程。An experimental platform was designed, and the sensitivity coefficient between the fiber compression strain and the resistance calibrated. The calibrated fibers are made into single-filament and multi-filament composite material system compression test specimens. Under the compressive load conditions, the influence of fiber fracture of multi-filament composite material specimen on surrounding fibers was investigated, and the maximum deformation of the fiber at the fracture was measured accurately. On the above basis, numerical methods were adopted to simulate the damage process of the micro-buckling of fibers around the fracture caused by the stress distribution of the matrix.

关 键 词：碳纤维电阻 压缩应变 数值方模拟 损伤过程 

分 类 号：O348[理学—固体力学]