Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (10): 71-76.doi: 10.13475/j.fzxb.20210903306

• Textile Engineering • Previous Articles     Next Articles

Nondestructive testing on damage of carbon fiber composites using ultrasonic C-scanning

FANG Zhouqian1, MIAO Peiyuan1, JIN Xiaoke1, ZHU Chengyan1,2, TIAN Wei1,2()   

  1. 1. College of Textile Science and Engineering(International Institute of Silk), Zhejiang Sci-Tech University,Hangzhou, Zhejiang 310018, China
    2. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2021-09-09 Revised:2022-03-29 Online:2022-10-15 Published:2022-10-28
  • Contact: TIAN Wei E-mail:tianwei_zstu@126.com

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Abstract:

With respect to the hole defects of the carbon fiber composites, the ultrasonic C-scan imaging detection technology was used to scan the specimens with holes, and the position of the defects obtained C-scan were analyze. The holed specimens were scanned, and the appearance of the scanned image was analyzed for causing reasons. Cluster analysis was performed to establish the relationship between the actual area of the defect and the detection area, and reflection scanning and scanning electron microscopy were carried out for the holed specimens and the composite delamination was analyzed according to the scanning waveform and electron microscopy. The research results show that there is a one-to-one correspondence between the C-scan image and the position of the composite material defect, and that when the hole diameter is larger than the beam width of the focusing probe, the edge of the hole does not affect the beam penetration and energy loss. The work indicated that the ultrasonic C-scan imaging detection technology can further verify holes and delamination defects.

Key words: ultrasonic testing, C-scan, carbon fiber composite material, hole defect, delamination defect

CLC Number: 

  • TB553

Fig.1

Distribution of holes"

Fig.2

Scanning image of CFRP hole specimen. (a)Overall scan picture;(b)Partial view with a hole diameter of 12 mm"

Fig.3

CFRP hole defect detection area and actual area statistics chart"

Fig.4

Waveform diagram in absence of defect. (a)Sampling point at no defect;(b)Waveformdiagram at defect-free sampling point"

Fig.5

Waveform diagram of defect. (a)Defective sampling point;(b)Waveform diagram at defective sampling point"

Fig.6

Scanning electron microscope images of CFRP hole section. (a)Hole section overall view;(b)Stratified and unstratified comparison chart; (c)Hierarchical graph; (d)Layered detail map"

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