Interaction of ultrasonic waves with structural damage: A diffraction analogy |
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| Authors: | R Jones S Pitt M Tan C Wallbrink WK Chiu |
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| Institution: | aDSTO Centre of Excellence in Structural Mechanics, Department of Mechanical Engineering, Monash University, Melbourne, Australia;bCommonwealth Research Centre for Integrated Engineering Assett Management, Department of Mechanical Engineering, Monash University, Melbourne, Australia;cAir Vehicles Division, DSTO, P.O. Box 4331, Melbourne, Vic. 3001, Australia |
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| Abstract: | This study investigates the interaction of ultrasonic waves and structural damage, i.e., cracking and corrosion. It is shown that cracking and corrosion damage produces a diffraction pattern that resembles that associated with the traditional physics of wave motion. The extension of this hypothesis implies that it may be possible to use a simple ripple tank to investigate how to best detect/sense and size a given damage state, e.g., corrosion. We also find that cracking, and corrosion damage, has a significant effect on both the amplitude and period of the waveform and also on the local (apparent) refractive index of the material and that these effects have the potential to be used as damage indicators. |
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| Keywords: | Finite element analysis Ultrasonic waves Cracking Corrosion Diffraction |
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