Application of Proper Orthogonal Decomposition to Damage Detection in Homogeneous Plates and Composite Beams
Publication: Journal of Engineering Mechanics
Volume 139, Issue 11
Abstract
The topic of the present paper is a damage detection technique based on the theory of proper orthogonal decomposition (POD). Numerical examples and experimental verification are conducted on an aluminum plate. The numerical examples provide useful information on the effect of several parameters, such as damage severity, type of excitation, noise level, and grid size of the sensors and on the reliability of the technique. The experimental verification using the POD method on the acceleration data show that it is possible to locate some defects in a cantilever plate; however, the analysis of the experimental data highlights the sensitivity of the method to the modification of the boundary conditions. Finally, the application of this technique to the detection of delamination in composite materials is conducted numerically on a cantilever beam. A three-dimensional model was used to investigate how the position of the damage along the length and thickness of the beam is detected and to demonstrate the sensitivity of the method to the location of the sensors with respect to the position of the damage.
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Acknowledgments
This research was partially supported by the Italian Ministry of Education, University and Research (MIUR), under PRIN Program 2010/11 No. 2010MBJK5B.
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 139 • Issue 11 • November 2013
Pages: 1539 - 1550
Copyright
© 2013 American Society of Civil Engineers.
History
Received: May 31, 2012
Accepted: Feb 7, 2013
Published online: Feb 9, 2013
Published in print: Nov 1, 2013
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