177 / 2019-07-24 20:48:02

Research on Actuation Behavior of Macro-fiber Composite Laminated Structures Based on Sinusoidal Shear Deformation Theory

macro fiber composite, MFC laminated structure, sinusoidal shear deformation theory

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A new piezoelectric composite, Macro Fiber Composite (MFC) is recombined by piezoceramics fiber, epoxy resin basal body, and interdigitated electrode. It has been widely applied into vibration reduction and deformation control of thin-wall structure, due to its great deformability and flexibility. The research on its actuation performance is mostly concentrated on the MFC actuating force calculation based on the classical plate theory (CPT) and the overall modeling of MFC and structure. But they have some deficiencies in tedious calculating process and neglect of shear deformation respectively. To obtain the precise MFC actuating force, the sinusoidal shear deformation theory (SSDT) is adopted to deduce the MFC actuating force formula, and global-local displacement distribution functions are introduced to help MFC laminated plate structure satisfy deformation compatibility and stress balance. Take the end displacement calculation of MFC laminated beam structure, for instance. The experimental result of MFC laminated beam is compared with those of MFC actuating force based on SSDT and on CPT, which indicates that the MFC actuating force formula based on SSDT can reach higher computational accuracy.