A comparative study of non-destructive evaluation of glass fiber reinforced polymer composites using terahertz, X-ray, and ultrasound imaging

다국어 초록 (Multilingual Abstract)

A set of samples of glass fiber reinforced polymer composites with Teflon inclusions in the shape of pentagram have been specifically designed and fabricated for the purpose of assessing the efficacy and practicality of terahertz (THz) time domain spectroscopy (TDS) system in non-destructive evaluation (NDE), in side-by-side comparison with X-ray computed tomography (CT), and ultrasonic imaging. The samples feature systematic variation of Teflon inclusions of a variety of thicknesses and placement depths. An improved THz imaging algorithm is proposed and demonstrated to enhance the capability of THz-TDS detection by adding an appropriate window for sampling the reflected time-domain waveform a posteriori. Additionally, image fusion algorithm based on block segmentation is applied to combine multiple imaging detection results, leading to further improvement of the final defect detection capability. Comparative analysis of the detection results among THz-TDS, X-ray CT, and ultrasonic imaging is carefully carried out to assess the merits and disadvantages of each technique, and to attempt to find a proper place for THz-TDS imaging in the traditional arsenal of NDE tools.

참고문헌 (Reference)

1 Schilling, P. J., "X-ray computed microtomography of internal damage in fi ber reinforced polymer matrix composites" 65 (65): 2071-2078, 2005

2 Amolins, K., "Wavelet based image fusion techniques—An introduction, review and comparison" 62 (62): 249-263, 2007

3 Zhu, W., "Ultrasonic guided wave NDT for hidden corrosion detection" 10 (10): 205-225, 1998

4 Chady, T., "Testing of glass-fi ber reinforced composite materials using terahertz technique" 33 (33): 1599-1605, 2010

5 Rutz, F., "Terahertz quality control of polymeric products" 27 (27): 547-556, 2017

6 박제웅, "Terahertz Radiation NDE of Composite Materials for Wind Turbine Applications" 한국정밀공학회 15 (15): 1247-1254, 2014

7 Matheisa, C., "Terahertz FMCW inspection of GFRP composites: Comparison with conventional NDT techniques and enhanced defect detection capability through" 1-4, 2014

8 Mittleman, D. M., "T-ray tomography" 22 (22): 905-906, 1997

9 Zhang, J., "Spectroscopic study of terahertz refl ection and transmission properties of carbon-fi ber-reinforced plastic composites" 54 (54): 54106-, 2015

10 Yang, R., "Progress and trends in nondestructive testing and evaluation for wind turbine composite blade" 60 : 1225-1250, 2016

11 Ryu, C. H., "Nondestructive evaluation of hidden multi-delamination in a glass-fi ber-reinforced plastic composite using terahertz spectroscopy" 156 : 338-347, 2016

12 Dong, J., "Nondestructive evaluation of forced delamination in glass fi ber-reinforced composites by terahertz and ultrasonic waves" 79 : 667-675, 2015

13 Zhang, J., "Nondestructive evaluation of carbon fi ber reinforced polymer composites using refl ective terahertz imaging" 16 (16): 875-887, 2016

14 Stoik, C., "Nondestructive evaluation of aircraft composites using transmissive terahertz time domain spectroscopy" 16 (16): 17039-17051, 2008

15 Stoik, C., "Nondestructive evaluation of aircraft composites using refl ective terahertz time domain spectroscopy" 43 (43): 106-115, 2010

16 김도형, "Nondestructive Evaluation of Hidden Damages in Glass Fiber Reinforced Plastic by Using the Terahertz Spectroscopy" 한국정밀공학회 4 (4): 211-219, 2017

17 Zhang, J., "Noncontact detection of tefl on inclusions in glass-fi ber-reinforced polymer composites using terahertz imaging" 55 (55): 10215-10222, 2016

18 Palka, N., "Non-destructive evaluation of puncture region in polyethylene composite by terahertz and X-ray radiation" 92 : 315-325, 2016

19 David Kuei Hsu, "NDE Inspection of Terahertz Waves in Wind Turbine Composites" 한국정밀공학회 13 (13): 1183-1189, 2012

20 Thi, T. B. N., "Measurement of fi ber orientation distribution in injection-molded short-glass-fi ber composites using X-ray computed tomography" 219 : 1-9, 2015

21 Burgueño, R., "Experimental dynamic characterization of an FRP composite bridge superstructure assembly" 54 (54): 427-444, 2001

22 Dong, J. L., "Enhanced terahertz imaging of small forced delamination in woven glass fi brereinforced composites with wavelet de-noising" 37 (37): 289-301, 2016

23 Berry, M., "Eff ect of cold temperatures on the behavior and ultimate capacity of GFRP-reinforced concrete beams" 136 : 9-16, 2016

24 Lopato, P., "Double-sided terahertz imaging of multilayered glass fi ber-reinforced polymer" 7 (7): 661-675, 2017

25 Liu, L. D., "Defect types and ultrasonic nondestructive testing for fi ber-reinforced composites" 834–836 : 233-236, 2014

26 Ospald, F., "Aeronautics Composite Material Inspection with a Terahertz Timedomain Spectroscopy System" 53 : 031208-, 2013

27 임광희, "Advanced T-Ray Nondestructive Evaluation of Defects in FRP Solid Composites" 한국정밀공학회 14 (14): 1093-1098, 2013