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- W2802078912 abstract "Nondestructive methods, to calculate the buckling load of imperfection sensitive thin-walled structures,are one of the most important techniques for the validation of new structures and numerical models oflarge scale aerospace structures. The vibration correlation technique (VCT) allows determining thebuckling load for several types of structures without reaching the instability point, but this technique isstill under development for thin-walled plates and shells.This paper presents and discusses an experimental and numerical validation of a novel approach,using the vibration correlation technique, for the prediction of realistic buckling loads on unstiffenedcylindrical shells loaded in compression. From the experimental point of view, a batch of threecomposite laminated cylindrical shells are fabricated and loaded in compression up to buckling. Anunsymmetric laminate is adopted in order to increase the sensitivity of the test structure to initialgeometric imperfections. In order to characterize a relationship with the applied load, the first naturalfrequency of vibration and mode shape is measured during testing using a 3D laser scanner. Theproposed vibration correlation technique allows one to predict the experimental buckling load with avery good approximation, without actually reaching the instability point. Furthermore, a series ofnumerical models, including non-linear effects such as initial geometric and thickness imperfection, arecarried-out in order to characterize the variation of the natural frequencies of vibration with the appliedload and compare the results with the experiment findings. Additional experimental tests are currentlyunder development to further validate the proposed approach for metallic and balanced compositestructures." @default.
- W2802078912 created "2018-05-17" @default.
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- W2802078912 date "2015-05-14" @default.
- W2802078912 modified "2023-09-25" @default.
- W2802078912 title "Experimental and numerical estimation on unstiffened cylindrical shells using vibration correlation technique" @default.
- W2802078912 hasPublicationYear "2015" @default.
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