Spectral and Perturbation Analysis of First-Order Beams With Notch Damage

Apetre, N and Ruzzene, M and Hanagud, S and Gopalakrishnan, S (2008) Spectral and Perturbation Analysis of First-Order Beams With Notch Damage. In: Journal of Applied Mechanics, 75 (3). 031019-1-031019-10.

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Abstract

The influence of damage on waves propagating in beam structures is investigated through a numerical model formulated by combining spectral finite elements and perturbation techniques. The resulting numerical tool allows for an efficient computation of the wave propagation response and the analysis of the effects of localized damages of various extents and locations. The dynamic behavior of damaged beams is described through a first-order model, which couples bending and axial behavior, thus allowing the prediction of mode conversion phenomena. Damage is modeled as a small, localized reduction of the beam thickness which, allows for an application of perturbation theory. Numerical examples in the time and frequency domains are presented to illustrate the model capabilities.

Item Type:	Journal Article
Publication:	Journal of Applied Mechanics
Publisher:	American Society of Mechanical Engineers
Additional Information:	Copyright of this article belongs to American Society of Mechanical Engineers.
Keywords:	Damaged beam;notched beam;spectral finite element method;perturbation techniques;first order beam theory.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	07 Jul 2008
Last Modified:	19 Sep 2010 04:46
URI:	http://eprints.iisc.ac.in/id/eprint/14820

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