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چکیده
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This research points out the positive results of structural deformations and follower forces exerted on a sandwich composite plate. This phenomenon that is named “flutter” is a dynamic instability and defines the ductility of the structure in fluid flow. Herein, the effective elastic properties of the reinforced composite by carbon nanotubes are acquired by the rule of mixture. Pasternak foundation has developed normal and shear modulus. The upper and lower layers of the sandwich are selected from the smart magnetostrictive sheets. A feedback control system pursues the magnetization effects of Terfenol-D films on the flutter vibration characteristics of sandwich plate. Five coupled equations of motion are derived using Hamilton's principle. These equations are solved by differential quadrature methods. Results of this study detected the critical values of follower forces corresponding to the start of flutter and divergence instabilities considering the effect of thickness ratios of the sandwich plate and velocity feedback gain, volume fraction of fibers and temperature gradient. The results of this research are used in the diagnosis of new structures used in aerospace, military and facilities industries.
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