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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/2021

Title: Three-dimensional guided waves in laminated composite plates excited from point source
Authors: BANERJI, P
NAYAK, S
SHAH, AH
Keywords: elastic-waves
propagation
Issue Date: 2005
Publisher: SPIE-INT SOC OPTICAL ENGINEERING
Citation: Health Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems IV,5768,334-343
Abstract: Three dimensional wave propagation characteristics in laminated plates are studied considering this anisotropic and viscoelastic properties of fiber reinforced composite material. A Rayleigh-Ritz based stiffness method is used to discretize the plate in the vertical direction to determine propagation characteristics (wave number, phase velocity, group velocity) and mode shapes for a plane wave front. For 3-dimesional cases, wave propagation problem is decomposed into a series of two-dimensional plane wave problems with three displacements coupled. Double Fourier transform integral transformations are used to get the governing equation in a transformed wave number domain. Steady state elastodynamic Green's functions for the laminated composite plates are constructed through summing the contribution of all two-dimensional problems and the application of modal summation technique. Numerical integration of double infinite integrals is performed by summations over a finite range. The wave propagation characteristics for a 16-layer unidirectional fibre reinforced laminated composite plate show the orthotropic nature of the plate reflected in its 3-D wave propagation characteristics. It is also seen that the Green's functions for 3D waves are very different from those for plane strain 2D waves. Furthermore, the direction of propagation has a significant effect on the Green's function for surface displacements.
URI: http://dx.doi.org/10.1117/12.599740
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15298
http://hdl.handle.net/100/2021
ISBN: 0-8194-5749-3
ISSN: 0277-786X
Appears in Collections:Proceedings papers

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