Abstract
In this work, the terahertz (THz) spectroscopy system was used for the detecting and evaluation of hidden damages in a glass fiber reinforced plastic (GFRP). The interaction between THz and the GFRP was analyzed including the effects of reflecting, scattering and absorption of THz radiations with respect to the type of hidden damage. Both the transmission and reflective configurations were used to investigate the hidden damages including the delamination, fiber fracture and moisture absorption. Finally, the hidden damages inside of the composite laminates were successfully imaged simultaneously based on the time-domain spectroscopy of THz radiation. Additionally, the moisture absorption damage in the GFRP could be detected by analyzing of the frequency domain spectrum. It is expected that the developed THz nondestructive evaluation (NDE) technique can be widely used to evaluate the health of the composite structures.
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Abbreviations
- R s :
-
Reflectance for s-polarized THz wave
- R p :
-
Reflectance for p-polarized THz wave
- R :
-
Reflectance for THz wave
- T :
-
Transmittance for THz wave
- n 1 :
-
Refractive index of incidence materials
- n 2 :
-
Refractive index of refraction materials
- n :
-
Refractive index
- θ 1 :
-
Incidence angle of THz wave
- θ 2 :
-
Refractive angle of the THz wave
- A :
-
Absorbance of refraction material
- I 0 :
-
Initial power of THz wave
- x :
-
Thickness of specimen
- α :
-
Absorption coefficient of refractive materials
- ɛ r :
-
Relative permittivity of the material
- µ r :
-
Relative permeability of the material
References
Beardmore, P., “Composite Structures for Automobiles,” Compos Struct, Vol. 5, No. 3, pp. 163–176, 1986.
Asnafi, N., Langstedt, G., Andersson, C.-H., Östergren, N., and Håkansson, T., “A New Lightweight Metal-Composite-Metal Panel for Applications in the Automotive and Other Industries,” Thin-Walled Structures, Vol. 36, No. 4, pp. 289–310, 2000.
Beardmore, P. and Johnson, C., “The Potential for Composites in Structural Automotive Applications,” Composites Science and Technology, Vol. 26, No. 4, pp. 251–281, 1986.
Kapadia, A., “Non Destructive Testing of Composite Materials,” National Composites Network, pp. 1–4, 2007.
Mangalgiri, P., “Composite Materials for Aerospace Applications,” Bulletin of Materials Science, Vol. 22, No. 3, pp. 657–664, 1999.
Stoik, C., Bohn, M., and Blackshire, J., “Nondestructive Evaluation of Aircraft Composites Using Reflective Terahertz Time Domain Spectroscopy,” NDT&E International, Vol. 43, No. 2, pp. 106–115, 2010.
Shull, P. J., “Nondestructive Evaluation: Theory, Techniques, and Applications,” CRC Press, 2016.
Summerscales, J., “Non-Destructive Testing of Fibre-Reinforced Plastics Composites,” Springer Science & Business Media, 1990.
Lee, Y.-S., “Principles of Terahertz Science and Technology,” Springer Science & Business Media, 2009.
Chan, W. L., Deibel, J., and Mittleman, D. M., “Imaging with Terahertz Radiation,” Reports on Progress in Physics, Vol. 70, No. 8, pp. 1325, 2007.
Wang, S. and Zhang, X. C., “Pulsed Terahertz Tomography,” Journal of Physics D: Applied Physics, Vol. 37, No. 4, pp. R1–R36, 2004.
Wietzke, S., Jordens, C., Krumbholz, N., Baudrit, B., Bastian, M., et al., “Terahertz Imaging: A New Non-Destructive Technique for the Quality Control of Plastic Weld Joints,” Journal of the European Optical Society-Rapid Publications, 2007.
Anbarasu, A., “Characterization of Defects in Fiber Composites Using Terahertz Imaging,” M.Sc. Thesis, Georgia Institute of Technology, pp. 1–42, 2008.
Png, G. M., “Terahertz Spectroscopy and Modelling of Biotissue,” Ph.D. Thesis, University of Adelaide, 2010.
Im, K.-H., Hsu, D. K., Chiou, C.-P., Barnard, D. J., Jung, J.-A., et al., “Terahertz Wave Approach and Application on FRP Composites,” Advances in Materials Science and Engineering, Article ID: 563962, 2013.
Stoik, C. D., Bohn, M. J., and Blackshire, J. L., “Nondestructive Evaluation of Aircraft Composites Using Transmissive Terahertz Time Domain Spectroscopy,” Optics Express, Vol. 16, No. 21, pp. 17039–17051, 2008.
Ryu, C.-H., Park, S.-H., Kim, D.-H., Jhang, K.-Y., and Kim, H.-S., “Nondestructive Evaluation of Hidden Multi-Delamination in a Glass-Fiber-Reinforced Plastic Composite Using Terahertz Spectroscopy,” Composite Structures, Vol. 156, pp. 338–347, 2016.
Stoik, C. D., “Nondestructive Evaluation of Aircraft Composites Using Terahertz Time Domain Spectroscopy,” Optics Express, Vol. 16, No. 21, pp. 17039–17051, 2008.
Ferguson, B. and Zhang, X. C., “Materials for Terahertz Science and Technology,” Nature Materials, Vol. 1, No. 1, pp. 26–33, 2002.
Mittleman, D. M., Gupta, M., Neelamani, R., Baraniuk, R. G., Rudd, J. V., et al., “Recent Advances in Terahertz Imaging,” Applied Physics B, Vol. 68, No. 6, pp. 1085–1094, 1999.
Saeedkia, D., “Handbook of Terahertz Technology for Imaging,” Sensing and Communications, Elsevier, 2013.
Xin, X., Altan, H., Saint, A., Matten, D., and Alfano, R. R., “Terahertz Absorption Spectrum of Para and Ortho Water Vapors at Different Humidities at Room Temperature,” Jouranl of Applied Physics, Vol. 100, No. 9, Paper No. 094905, 2006.
Swift, G. P., Dai, D., and Fletcher, J. R., “Terahertz Scattering: Comparison of a Novel Theoretical Approach with Experiment,” Proc. of International Society for Optics and Photonics in Integrated Optoelectronic Devices, 2006.
Im, K.-H., Lee, K.-S., Yang, I.-Y., Yang, Y.-J., Seo, Y.-H., et al., “Advanced T-Ray Nondestructive Evaluation of Defects in FRP Solid Composites,” Int. J. Precis. Eng. Manuf., Vol. 14, No. 6, pp. 1093–1098, 2013.
Rutz, F., Koch, M., Khare, S., Moneke, M., Richter, H., et al., “Terahertz Quality Control of Polymeric Products,” International Journal of Infrared and Millimeter Waves, Vol. 27, No. 4, pp. 547–556, 2006.
Park, J.-W., Im, K.-H., Yang, I.-Y., Kim, S.-K., Kang, S.-J., et al. “Terahertz Radiation NDE of Composite Materials for Wind Turbine Applications,” Int. J. Precis. Eng. Manuf., Vol. 15, No. 6, pp. 1247–1254, 2014.
Yang, T., Brown, R., Kempel, L., and Kofinas, P., “Controlled Synthesis of Core-Shell Iron-Silica Nanoparticles and their Magneto-Dielectric Properties in Polymer Composites,” Nanotechnology, Vol. 22, No. 10, Paper No. 105601, 2011.
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Kim, DH., Ryu, CH., Park, SH. et al. Nondestructive evaluation of hidden damages in glass fiber reinforced plastic by using the terahertz spectroscopy. Int. J. of Precis. Eng. and Manuf.-Green Tech. 4, 211–219 (2017). https://doi.org/10.1007/s40684-017-0026-x
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DOI: https://doi.org/10.1007/s40684-017-0026-x