固体火箭技术2024，Vol.47Issue(3)：411-420,10.DOI:10.7673/j.issn.1006-2793.2024.03.015
基于声发射技术的T800碳纤维复合材料拉伸失效机制分析
Analysis of failure mechanism of unidirectional T800 CFRP under tension based on acoustic emission technology
董少静 1李凯 1丁文辉 2王立强 3申秀丽1
作者信息
- 1. 北京航空航天大学 能源与动力工程学院,北京 100191
- 2. 航天动力技术研究院,西安 710025
- 3. 西安航天动力技术研究所,西安 710025
- 折叠
摘要
Abstract
To reveal the failure mechanism of the carbon fiber wound composite case in solid rocket motors under multiple load conditions,tensile tests were carried out on unidirectional T800 carbon fiber reinforced plastic specimens under different off-axis an-gles.By employing acoustic emission(AE)non-destructive testing technology,complete waveform signals of the specimens were ac-quired,and characteristic parameters of AE signals were selected using the Pearson correlation coefficient.The K-means clustering algorithm was used to cluster AE signals,and the different damage mechanisms were corresponding to the AE cluster based on the microscopic fracture morphology captured by scanning electron microscopy(SEM).Furthermore,representative volume elements in conjunction with a progressive damage method was utilized to realize the numerical simulation of damage process of unidirectional composites.The analysis results show that the correlation coefficient between the peak frequency and amplitude of the AE signal is less than 0.2.By combining with the stress-strain curve obtained from numerical simulation,cluster analysis is conducted on the AE signal using the two parameters,which indicate that fiber breakage has the highest peak frequency,matrix cracking has an interme-diate peak frequency,interface debonding has the lowest peak frequency and the AE signal amplitude is highest when macroscopic damage occurr in the test specimen.关键词
碳纤维复合材料/固体火箭发动机/纤维缠绕壳体/声发射/偏轴拉伸/聚类分析/渐进损伤Key words
carbon fiber composite/solid rocket motor/filament-wound case/acoustic emission/off-axis tensile/cluster analy-sis/progressive damage分类
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董少静,李凯,丁文辉,王立强,申秀丽..基于声发射技术的T800碳纤维复合材料拉伸失效机制分析[J].固体火箭技术,2024,47(3):411-420,10.
