Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method

In the present study, a damage detection problem is formulated as the identification of the spatial stiffness distribution in a damaged composite plate. Full-field heterogeneous curvature fields obtained from an optical deflectometry technique are processed by using the virtual fields method adapted to...

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Bibliographic Details
Main Authors: Kim, J.-H., Pierron, F., Wisnom, M. R., Kashif, Syed Muhammad
Format: Article
Language:English
Published: Science Direct 2007
Subjects:
Online Access:http://irep.iium.edu.my/6732/
http://irep.iium.edu.my/6732/
http://irep.iium.edu.my/6732/
http://irep.iium.edu.my/6732/1/SMK_P-1.pdf
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Summary:In the present study, a damage detection problem is formulated as the identification of the spatial stiffness distribution in a damaged composite plate. Full-field heterogeneous curvature fields obtained from an optical deflectometry technique are processed by using the virtual fields method adapted to retrieve the 2D stiffness distribution map of a damaged carbon-epoxy plate. The method not only picks up the location of the damage but also provides a fairly good estimate of the stiffness reduction in the damaged area. In this paper, the procedure is described, validated on simulated measurements and some initial experimental results are given. � 2007 Elsevier Ltd. All rights reserved.