Accession Number : ADA448609
Title : An Experimental Investigation of Guided Wave Propagation in Corrugated Plates Showing Stop Bands and Pass Bands (PREPRINT)
Descriptive Note : Journal article preprint
Corporate Author : ARIZONA UNIV TUCSON DEPT OF CIVIL ENGINEERING
Personal Author(s) : Kundu, T. ; Banerjee, S. ; Jata, Kumar V.
PDF Url : ADA448609
Report Date : FEB 2006
Pagination or Media Count : 29
Abstract : For health monitoring of structures with periodic geometry a good understanding of the elastic wave propagation through such periodic structures is necessary. Although a number of research papers on the wave propagation through periodic structures are available in the literature hardly anyone investigated experimentally the guided wave propagation through plates with periodic plate boundaries and compared the experimental data with theoretical predictions. In this paper the elastic wave propagation in three different plates with different degrees of corrugation is experimentally studied. The experimental results clearly show that elastic waves can propagate through the corrugated plate (waveguide) for certain frequencies called pass bands and find it difficult to propagate for some other frequencies called stop bands. Stop bands are found to increase with the degree of corrugation. Experimental results for non-sinusoidal periodic plates are compared with the theoretical predictions for sinusoidal corrugated plates and good matching is observed for plates with small degree of corrugation indicating that for small corrugation depths only two parameters - the depth of corrugation and the wavelength of the periodicity - are enough for modeling the elastic wave propagation through the corrugated plate.
Descriptors : *EXPERIMENTAL DATA, *WAVE PROPAGATION, *ELASTIC WAVES, MODELS, WAVEGUIDES, DISPERSION RELATIONS, CORRUGATING, LOG PERIODIC STRUCTURE, SINUSOIDAL FUNCTIONS
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE