Induced strain actuation of bending-extension coupled composite split cylinders

Po-Yun Tang

doi:10.1117/12.240841

31 May 1996 Induced strain actuation of bending-extension coupled composite split cylinders

Po-Yun Tang

Proceedings Volume 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures; (1996) https://doi.org/10.1117/12.240841
Event: 1996 Symposium on Smart Structures and Materials, 1996, San Diego, CA, United States

Abstract

A beam-type model has been developed for antisymmetric cross-ply laminated split cylindrical shells bonded to their concave sides with actuators, such as relatively thick lead zirconium titanate drivers. The model properly accounts for the bending-extension (b-e) coupling properties of the antisymmetric cross-ply laminates and the effects of stiffness and density of the actuators. Using this model, solutions have been obtained for simply-supported actuator- shells under direct-voltage actuation, free vibration, and sinusoidal-voltage actuation. From the solutions, analytical formulas have been derived to evaluate the bending deformation increase and fundamental frequency reduction of such actuator-shells due to the b-e coupling properties. The purpose of this study is to improve the performance of low-frequency wall- driven acoustic projectors, including split cylindrical transducers with the actuator-radiator configurations under the study. As is well known, the basic acoustic radiation mechanism of all these projectors is the conversion of the extensional deformation of the actuator into the bending motion of the radiator. Hence, it seems beneficial to use a radiator material with inherent b-e coupling properties. Indeed, application of the above-mentioned formulas to the existing laminates demonstrates that substantial bending deformation increase and fundamental frequency reduction of the split cylinders can be achieved.

Citation Download Citation

Po-Yun Tang "Induced strain actuation of bending-extension coupled composite split cylinders", Proc. SPIE 2715, Smart Structures and Materials 1996: Mathematics and Control in Smart Structures, (31 May 1996); https://doi.org/10.1117/12.240841

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