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Proceedings Paper

Application of thermosonics NDT in the detection of composite materials
Author(s): Yue Li; Zhi Zeng; Dapeng Chen; Chungfei Xing; Ning Tao; Cunlin Zhang
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Paper Abstract

Composite materials have been applied widely in a lot of fields because of their excellent performance. And the composite materials may have some defects and be damaged in the process of manufacturing and usage, which will result in the performance degradation of the composite structure and even a failure. Thus, it is necessary to detect the defects of the composite materials. This paper introduced the thermosonics nondestructive testing technology, described the fundamental principle of the technology, and gave some experimental results of two kinds of composite materials. One of the two materials is carbon fiber foam sandwich composite material which has six pre-embedded debonding defects, and the other one is carbon fiber laminated board with the impact damage caused by collisions with different energies. And the testing results of the two materials by thermosonics are satisfactory. However, at present, the usual thermal wave imaging nondestructive testing technique for detecting composite materials is based on flash pulse excitation. In this paper, the carbon fiber laminated board was also detected by the pulsed method. And this paper further compared these two kinds of thermal wave imaging nondestructive testing techniques and the corresponding results with different excitation ways. Some differences could be found between these two methods by analyzing the results obtained by different excitation ways. Furthermore, based on the differences and the other factors such as the principles and devices of these two methods, we could summarize and know that these two methods have their respective advantages and disadvantages and could be applied to different situations. In the actual testing process, which method will be selected to detect the defects depends on the specific demands of the experiment and the characteristics of these two methods. And these two methods can also be used together to detect defects for a comprehensive and effective result.

Paper Details

Date Published: 11 October 2010
PDF: 7 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76563S (11 October 2010); doi: 10.1117/12.865344
Show Author Affiliations
Yue Li, Capital Normal Univ. (China)
Zhi Zeng, Chongqing Normal Univ. (China)
Dapeng Chen, Beihang Univ. (China)
Chungfei Xing, Capital Normal Univ. (China)
Ning Tao, Capital Normal Univ. (China)
Cunlin Zhang, Capital Normal Univ. (China)

Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Yudong Zhang; Jose M. Sasian; Libin Xiang; Sandy To, Editor(s)

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