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A novel method for damage analysis of CFRP single-lap bolted, bonded and hybrid joints under compression
Composite Structures ( IF 6.3 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.compstruct.2020.112636
Hongzhuang Zhang , Changyou Li , Mengtao Xu , Zhendong Liu , Dawei Jia , Yimin Zhang

Abstract The purpose of this paper is to investigate the failure mechanisms of carbon fiber reinforced composites (CFRP) single-lap bolted, bonded and hybrid bolted/bonded joints during compression. The failure process and the failure mechanisms of the compression tests were analyzed using field emission scanning electron microscope (FESEM) and acoustic emission (AE) technique. A novel method is proposed to obtain the relationship between the FESEM analysis and AE signals. The crack data is obtained by identifying, segmenting and quantizing FESEM images based on image processing technology. The final results give effective AE parameters for identifying crack damage in composite joints, and show the superiority of the proposed method. The research in this paper puts forward important suggestions for the application of AE technique in composites and fault diagnosis.

中文翻译:

CFRP 单搭接螺栓、粘结和混合接头受压损伤分析的新方法

摘要 本文的目的是研究碳纤维增强复合材料(CFRP)单搭接螺栓、粘结和混合螺栓/粘结接头在压缩过程中的失效机制。采用场发射扫描电子显微镜(FESEM)和声发射(AE)技术分析了压缩试验的失效过程和失效机理。提出了一种获得FESEM分析和AE信号之间关系的新方法。裂纹数据是基于图像处理技术对FESEM图像进行识别、分割和量化得到的。最终结果给出了识别复合材料接头裂纹损伤的有效声发射参数,并表明了所提出方法的优越性。
更新日期:2020-11-01
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