A geometrically nonlinear composite thin-walled beam theory with fiber-reinforced and piezo-composite is developed. Some non-classical effects such as anisotropy, warping inhibition and three-dimensional (3-D) strain are accounted for in the beam model. The governing equations and the corresponding boundary conditions are derived using the Hamilton's principle. The Extended Galerkin's Method is used for the numerical study. The static and dynamical characteristics of the adaptive thin-walled structure are investigated by studying anisotropic properties of piezo-actuators, considered in conjunction with that of the structural tailoring of the fiber-reinforced host structure. Furthermore, the beneficial effects of the implementation of the active feedback control and tailoring technology on advanced adaptive aircraft wings or rotor blades, that can be modeled as the thin-walled beam developed in this dissertation, are highlighted.
Viene sviluppata una teoria di travi a parete sottile composita geometricamente non lineare con fibre rinforzate e piezo-compositi. Alcuni effetti non classici come l'anisotropia, l'inibizione del warping e il ceppo tridimensionale (3-D) sono considerati nel modello del fascio. Le equazioni governanti e le corrispondenti condizioni al contorno sono derivate usando il principio di Hamilton. Il metodo Extended Galerkin viene utilizzato per lo studio numerico. Le caratteristiche statiche e dinamiche della struttura adattiva a parete sottile sono studiate studiando proprietà anisotropiche di piezo-attuatori, considerate in congiunzione con quella della sartoria strutturale della struttura ospite rinforzata con fibre. Inoltre, gli effetti benefici dell'attuazione del controllo di feedback attivo e della tecnologia sartoriale su ali di velivoli adattivi avanzati o pale del rotore, che possono essere modellate come il fascio a parete sottile sviluppato in questa dissertazione, sono evidenziati.
Modeling and control of adaptive geometrically nonlinear thin-walled beams with piezo-composite: applications for rotary and fixed aircraft wings
WANG, XIAO
Abstract
A geometrically nonlinear composite thin-walled beam theory with fiber-reinforced and piezo-composite is developed. Some non-classical effects such as anisotropy, warping inhibition and three-dimensional (3-D) strain are accounted for in the beam model. The governing equations and the corresponding boundary conditions are derived using the Hamilton's principle. The Extended Galerkin's Method is used for the numerical study. The static and dynamical characteristics of the adaptive thin-walled structure are investigated by studying anisotropic properties of piezo-actuators, considered in conjunction with that of the structural tailoring of the fiber-reinforced host structure. Furthermore, the beneficial effects of the implementation of the active feedback control and tailoring technology on advanced adaptive aircraft wings or rotor blades, that can be modeled as the thin-walled beam developed in this dissertation, are highlighted.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/137087