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Structural health monitoring in a composite beam using magnetostrictive material through a new FE formulation

Ghosh, DP and Gopalakrishnan, S (2003) Structural health monitoring in a composite beam using magnetostrictive material through a new FE formulation. In: SPIE: Smart Materials, Structures, and Systems, 12-14 December, Bangalore, India, Vol.5062, 704-711.

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Abstract

A new finite element formulation was derived for structural health monitoring of laminated composite beam containing embedded magnetostrictive patches, which will act both as sensors and actuators. Coils are considered to activate patches and/or to sense the changes in stress in patches. When the actuator patch is excited dynamically by passing alternating current through the actuation coil, it introduces stress in the structure due to magneto mechanical coupling effect, which in turn produce magnetic flux in the sensing patches. This magnetic flux generates open circuit voltage in the sensing coils. Measurements of open circuit voltage before and after the damage(delamination) occurrence provides a diagnostic to indicate the presence of the damage. Numerical results have been obtained for one combination of actuator and sensor locations.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to International Society for Optical Engineering (SPIE).
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 27 Apr 2007
Last Modified: 07 Oct 2010 05:00
URI: http://eprints.iisc.ernet.in/id/eprint/10201

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