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Damage detection in plates by wave propagation analyses
Author(s) -
Meyfarth Daniel,
von Ende Sven,
Lammering Rolf
Publication year - 2008
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200810689
Subject(s) - lamb waves , acoustics , surface wave , wave propagation , materials science , optics , actuator , structural health monitoring , physics , engineering , composite material , electrical engineering
At locations with defects the propagation of elastic waves in solids is disturbed. This behaviour can be used for the development of new structural health monitoring and quality assurance systems. In the sense of adaptive structure systems actuators of piezo–electric materials [1] are implemented to generate high frequency waves (Lamb waves) in plate like structures, [2]. At flaws, imperfections of the structure and surface defects these waves show reflections, refractions and mode conversions. The observation of the wave propagation and the wave behaviour at possible flaws and surface defects is performed by an optical measurement system. Measurement data of the thin walled metallic plates are compared with numerical and analytical solutions. First results of the detection of the wave propagation in metallic plates are presented. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)