Visualized characterization of diversified defects in thick aerospace composites using ultrasonic B-scan

Visualized characterization of diversified defects in thick aerospace composites using ultrasonic B-scan
Title:
Visualized characterization of diversified defects in thick aerospace composites using ultrasonic B-scan
Other Titles:
Composites Communications
Publication Date:
18 August 2020
Citation:
Abstract:
Multiple defects including fiber waviness, resin rich layers, porosity and delamination may initiate in aerospace composite structures during manufacturing and service, and thus potentially cause structural failure. In this paper, ultrasound testing for aerospace composites with complex microstructures was investigated through both simulation and experiment. Ultrasonic testing challenges of aerospace composites were concluded as frequency-dependent inter-ply reflection, interfering reflection from multiple defects, and frequency-dependent wave distortion caused by fiber waviness. Ultrasonic B-scan imaging with both amplitude and phase information at different frequencies are proposed to achieve defect differentiation and characterization for the thick composites with fiber waviness. This research will facilitate the understanding of defect presence in the B-scan images under different frequencies and indicate the direction for improving ultrasonic testing of aerospace composites.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
This research is supported by the Science & Engineering Research Council, Agency for Science, Technology and Research, Singapore, under its industry alignment fund - pre-positioning programme (IAF-PP) (Polymer Matrix Composite NDE, Grant No. A19C9a0044), and Foundation Committee of Fundamental and Applied Fundamental Research of Guangdong Province (Grant No. 2019A1515110704).
Description:
Please find the link to the article at the publisher's URL: https://doi.org/10.1016/j.coco.2020.100435
ISSN:
2452-2139
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