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Guided-wave based structural health monitoring of built-up composite structures using spectral finite element method

Ajith, V and Goapalakrishnan, S (2012) Guided-wave based structural health monitoring of built-up composite structures using spectral finite element method. In: Conference on Health Monitoring of Structural and Biological Systems, March 12-15, 2012, San Diego, CA, USA.

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Official URL: http://dx.doi.org/10.1117/12.914775

Abstract

The paper discusses basically a wave propagation based method for identifying the damage due to skin-stiffener debonding in a stiffened structure. First, a spectral finite element model (SFEM) is developed for modeling wave propagation in general built-up structures, using the concept of assembling 2D spectral plate elements and the model is then used in modeling wave propagation in a skin-stiffener type structure. The damage force indicator (DFI) technique, which is derived from the dynamic stiffness matrix of the healthy stiffened structure (obtained from the SFEM model) along with the nodal displacements of the debonded stiffened structure (obtained from 2D finite element model), is used to identify the damage due to the presence of debond in a stiffened structure.

Item Type: Conference Proceedings
Additional Information: Conference on Health Monitoring of Structural and Biological Systems, San Diego, CA, MAR 12-15, 2012
Keywords: Stiffened structure;wave propagation;SFEM;skin-stiffener debond;damage model
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 25 Jun 2012 12:28
Last Modified: 25 Jun 2012 12:51
URI: http://eprints.iisc.ernet.in/id/eprint/44711

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