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http://dx.doi.org/10.3795/KSME-A.2002.26.11.2457

Application of a Boundary element Method to the Analysis of ultrasonic Scattering by Flaws  

Jeong, Hyun-Jo (원광대학교 기계·시스템디자인공학부)
Kim, Jin-Ho (부산대학교 대학원 기계설계공학과)
Park, Moon-Cheol (원광대학교 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.11, 2002 , pp. 2457-2465 More about this Journal
Abstract
Numerical modeling of a nondestructive testing system plays an important role in many aspects of quantitative nondestructive evaluation (QNDE). The ultimate goal of a model is to predict test results for a specific flaw in a material. Thus, in ultrasonic testing, a system model should include the transducer, its radiation pattern, the beam reflection and propagation, and scattering from defects. In this paper attention is focused on the scattering model and the scattered fields by defects are observed by an elastodynamic boundary element method. Flaw types addressed are void-like and crack-like flaws. When transverse ultrasonic waves are obliquely incident on the flaw, the angular distribution of far-field scattered displacements are calculated and presented in the form of A-scan mode. The component signals obtained from each scattering problem are identified and their differences are addressed. The numerical results are also compared with those obtained by high frequency approximate solutions.
Keywords
Ultrasonic Testing; Scattering Analysis; Boundary Element Method; Void; Crack; Flaw Classification;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Achenbach, J. D., Gautesen, A. K., and McMaken, H., 1982, 'Ray Methods for Waves in Elastic Solids,' Pitman Publishing, Boston
2 Jeong, H. and Kim, J.-H., 2000, 'Analysis of Scattered Fields Using High Frequency Approximations2000,' Journal of the Korean Society for Nondestructive Engineering, Vol. 20, No.2, pp. 102-109   과학기술학회마을
3 Coffey, J. M., and Chapman, R. K., 1983, 'Application of Elastic Scattering Theory for Smooth Flat Cracks to the Quantitative Prediction of Ultrasonic Defect Detection and Sizing,' Nuclear Energy, Vol. 22, pp. 319 - 333
4 Gubematis, J. E, Domany, E., Krumhansl, J. A., and Huberman, M., 1977, 'The Born Approximation in the Theory of the Scattering of Elastic Waves by Flaws,' Journal of Applied Physics, Vol. 48, pp. 2812-2818   DOI
5 Chiou, C. P., Schmerr, L. W., 1991, 'Quasi pulse-echo Ultrasonic Technique For Flaw Classification,' Ultrasonics Vol. 29, pp. 471-481   DOI   ScienceOn
6 Dominguez, J., 1993, 'Boundary Elements in Dynamics,' Computational Mechanics Publications, Southampton, UK
7 Schafbuch, P. J., Rizzo, F. J., Thompson, R. B., 1990, 'Application of the Boundary Element Method to. Elastic Wave Scattering by Irregular Defects,' Journal of Nondestructive Evaluation, Vol. 9, pp. 113 -127   DOI