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Wave propagation in delaminated beam |
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| Authors: | Wies?aw Ostachowicz Marek Krawczuk Matthew Cartmell Michael Gilchrist |
| Affiliation: | a Polish Academy of Sciences, Institute of Fluid Flow Machinery, 14 Gen.J. Fiszera Street, 80-952 Gdańsk, Poland b Faculty of Electrical and Control Engineering, Technical University of Gdańsk, Narutowicza 11/12 Street, 80-952 Gdańsk, Poland c Department of Mechanical Engineering, University of Glasgow, Glasgow G12 8QQ, UK d Department of Mechanical Engineering, University College Dublin, Belfield, Dublin 4, Ireland |
| Abstract: | The wave propagation model investigated herein is based on the known fact that material discontinuities affect the propagation of elastic waves in solids. The change in certain material characteristics, such as a local change in stiffness or inertia caused by a crack or the presence of material damage, will affect the propagation of transmitted elastic waves and will modify the received signal. Wave frequencies associated with the highest detection sensitivity depend, among other things, on the type of structure, the type of material, and the type of damage. This paper presents a method of wave propagation, which can be further used to detect small delaminations in beam-like structures. The considered beam is modelled by spectral finite elements. |
| Keywords: | Wave propagation Spectral element Damage detection Delamination Composite materials |
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