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A Study on the Wavelet Transform of Acoustic Emission Signals Generated from Fusion-Welded Butt Joints in Steel during Tensile Test and its Applications  

Rhee, Zhang-Kyu (인천대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.16, no.1, 2007 , pp. 26-32 More about this Journal
Abstract
This study was carried out fusion-welded butt joints in SWS 490A high strength steel subjected to tensile test that load-deflection curve. The windowed or short-time Fourier transform(WFT or STFT) makes possible for the analysis of non-stationary or transient signals into a joint time-frequency domain and the wavelet transform(WT) is used to decompose the acoustic emission(AE) signal into various discrete series of sequences over different frequency bands. In this paper, for acoustic emission signal analysis to use a continuous wavelet transform, in which the Gabor wavelet base on a Gaussian window function is applied to the time-frequency domain. A wavelet transform is demonstrated and the plots are very powerful in the recognition of the acoustic emission features. As a result, the technique of acoustic emission is ideally suited to study variables which control time and stress dependent fracture or damage process in metallic materials.
Keywords
Acoustic Emission; Load-Deflection Curve; Fusion-Welded Butt Joints; Time-Frequency Analysis; Windowed or Short-Time Fourier Transform; Continuous Wavelet Transform; Gabor Wavelet; Gaussian Window Function;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Serrano, E. P. and Fabio, M. A., 1996, 'Application of the Wavelet Transform to Acoustic Emission Signal Processing,' IEEE Transaction on Signal Processing, Vol. 44, No. 5, pp. 1270-1275   DOI   ScienceOn
2 Suzuki, H., Kinjo, T., Hayashi, Y., Takemoto, M. and Ono, K., and Hayashi, Y., 1996, 'Wavelet Transform of Acoustic Emission Signals,' Journal of Acoustic Emission, Vol. 14, No. 2, pp. 69-84
3 Abbate, A., Koay, J., Frankel, J., Schroeder, S. C. and Das, P., 1997, 'Signal Detection and Noise Suppression Using a Wavelet Transform Signal Processor: Application to Ultrasonic Flaw Detection,' IEEE Transaction on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 44, No. 6, pp. 1382-1394   DOI   ScienceOn
4 Rhee, Z. K., Woo, C. K., Park, S. O., Yoon, J. H., Cho, J. H., Kim, B. G. and Koo, Y. D., 2004, 'A Study on the Acoustic Emission Characteristics of Weld Heat Affected Zone in SWS 490A Steel(1),' Transactions of the Korean Society of Machine Tool Engineers, Vol. 13, No. 4, pp. 113-120
5 Korean Standards Association, 2001, KS B 0833, KSA
6 Wang, W. J. and McFadden, P. D., 1996, 'Application of Wavelets to Gearbox Vibration Signals for Fault Detection,' Journal of Sound and Vibration, Vol. 192, No. 5, pp. 927-939   DOI   ScienceOn
7 Leaird, J. D., 1997, Acoustic Emission Training Guide: How to Ensure an Accurate and Valid Acoustic Emission, Greensland Publishing Company, Sacramento, California
8 Miller, R. K. and McIntire, P., 1987, Nondestructive Testing Handbook(2nd ed.), Vol. 5, Acoustic Emission Testing, American Society for Nondestructive Testing
9 Rhee, Z. K. and Woo, C. K., 2005, 'Experimental Studies on Joinability of SWS 490A High Tension Steel using Acoustic Emission Signals,' Transactions of the Korean Society of Machine Tool Engineers, Vol. 14, No. 3, pp. 87-95   과학기술학회마을
10 Chui, C. K., 1992, An Introduction to Wavelets, Academic Press, Inc., New York
11 Qi, G. and Barhorst, A. A., 1997, 'On Predicting the Fracture Behavior of CFR and GFR Composites Using Wavelet-Based AE Techniques,' Engineering Fracture Mechanics, Vol. 58, No. 4, pp. 363-385   DOI   ScienceOn