Wavelet spectral finite element modeling of transverse crack for structural health monitoring of composite plates

Samaratunga, D and Jha, R and Gopalakrishnan, S (2012) Wavelet spectral finite element modeling of transverse crack for structural health monitoring of composite plates. In: 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, 23-26 April 2012.

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Abstract

This paper presents a newly developed wavelet spectral finite element (WFSE) to analyze wave propagation in anisotropic laminated composite plate with a non propagating transverse crack. The WSFE is based on the first-order laminated plate theory, which takes shear deformation into consideration. The developed spectral element captures the exact inertial distribution as the governing partial differential equations (PDEs) are solved exactly in the transformed frequency-wavenumber domain. Wavelet transform is used to go back and forth between time and frequency domains. The developed procedure is very efficient computationally compared to conventional finite element (FE) modeling for wave propagation analysis. A transverse crack having an arbitrary length and depth and located parallel to one side of the plate is modeled using WSFE. Elastic behavior of the plate at crack location is considered as a line spring with a varying stiffness along the crack. Time domain results show partial reflections of the excited wave due to cracks at different time instances corresponding to crack locations.© 2012 by Ratneshwar Jha.

Item Type:	Conference Paper
Publication:	53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 2012
Publisher:	American Institute of Aeronautics and Astronautics Inc.
Additional Information:	The copyright for this article belongs to the American Institute of Aeronautics and Astronautics Inc.
Keywords:	Composite materials; Cracks; Laminated composites; Laminating; Plates (structural components); Structural dynamics; Structural health monitoring; Wave propagation; Wavelet analysis; Wavelet transforms, Anisotropic laminated composite plates; First order laminated plate theories; Frequency-wavenumber domains; Partial Differential Equations (PDEs); Propagation analysis; Spectral finite elements; Time and frequency domains; Transverse crack, Finite element method
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	05 Nov 2021 10:00
Last Modified:	05 Nov 2021 10:00
URI:	http://eprints.iisc.ac.in/id/eprint/65908

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