Rapid localization of damage using a circular sensor array and Lamb wave based triangulation

Giridhara, G and Rathod, VT and Naik, S and Mahapatra, Roy D and Gopalakrishnan, S (2010) Rapid localization of damage using a circular sensor array and Lamb wave based triangulation. In: Mechanical Systems and Signal Processing, 24 (8). pp. 2929-2946.

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Abstract

A damage detection and imaging methodology based on symmetry of neighborhood sensor path and similarity of signal patterns with respect to radial paths in a circular array of sensors has been developed It uses information regarding Limb wave propagation along with a triangulation scheme to rapidly locate and quantify the severity of damage without using all of the sensor data. In a plate like structure, such a scheme can be effectively employed besides full field imaging of wave scattering pattern from the damage, if present in the plate. This new scheme is validated experimentally. Hole and corrosion type damages have been detected and quantified using the proposed scheme successfully. A wavelet based cumulative damage index has been studied which shows monotonic sensitivity against the severity of the damage. which is most desired in a Structural Health Monitoring system. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	Mechanical Systems and Signal Processing
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Structural health monitoring; Damage detection; Circular array;Piezoelectric; Wavelet; Lamb wave.
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	20 Sep 2010 10:08
Last Modified:	20 Sep 2010 10:08
URI:	http://eprints.iisc.ac.in/id/eprint/32252

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