Experimental study on compression configurations and damage failure of 2.5D-C/C composites

doi:10.19936/j.cnki.2096-8000.20230928.007

Abstract

Abstract: In order to explore the damage process of 2.5D-C/C composites under room temperature compression test, the experimental results and damage modes under different compression configurations were compared by experimental methods. At the same time, the acoustic emission (AE) technology was used to realize online damage monitoring. The improved K-means clustering algorithm was used to carry out pattern recognition of AE signals, combined with the statistical analysis of the changes of AE signals and the microscopic characterization of scanning electron microscopy (SEM), it is found that the damage modes of 2.5D-C/C composites during compression test includes matrix cracking and crack propagation, interfacial debonding and fiber bending fracture. The damage modes is matched with AE signal to describe the evolution process of compression damage of the material.

Key words: C/C composites, acoustic emission, K-means cluster, pattern recognition, damage modes

CLC Number:

TB332

MENG Yi, YANG Shengchun, LIU Xiaochuan, YANG Hailong, SONG Guibin. Experimental study on compression configurations and damage failure of 2.5D-C/C composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(9): 48-54.

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