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Detecting delaminations in a composite beam using anti-optimization |
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| Authors: | J Lee R T Haftka O H Griffin Jr L T Watson M D Sensmeier |
| Affiliation: | (1) Dept. of Engineering Science and Mechanics, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA, USA;(2) Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA, USA;(3) Dept. of Computer Science and Mathematics, Virginia Polytechnic Institute and State University, 24061 Blacksburg, VA, USA |
| Abstract: | The present study proposes a detection technique for delaminations in a laminated beam. The proposed technique optimizes the spatial distribution of harmonic excitation so as to magnify the difference in response between the delaminated and intact beam. The technique is evaluated by numerical simulation of two-layered aluminum beams. Effects of measurement and geometric noise are included in the analysis. A finite element model for a delaminated composite, based on a layer-wise laminated plate theory is used in conjunction with a step function to simulate delaminations |
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