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Proceedings Paper

Structural health monitoring in a composite beam using magnetostrictive material through a new FE formulation
Author(s): D. P. Ghosh; S. Gopalakrishnan
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Paper 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.

Paper Details

Date Published: 14 October 2003
PDF: 8 pages
Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); doi: 10.1117/12.514687
Show Author Affiliations
D. P. Ghosh, Indian Institute of Science (India)
S. Gopalakrishnan, Indian Institute of Science (India)

Published in SPIE Proceedings Vol. 5062:
Smart Materials, Structures, and Systems
S. Mohan; B. Dattaguru; S. Gopalakrishnan, Editor(s)

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