Abstract
A new piezoelectric composite, macro fiber composite (MFC) is recombined with piezoceramic fibers, an epoxy resin basal body, and an interdigitated electrode. It has been widely applied in vibration reduction and deformation control of thin-walled structures, due to its great deformability and flexibility. Research on its actuation performance is mostly concentrated on the MFC actuating force calculation based on classical plate theory (CPT), and the overall modeling of MFC and its structure. However, they have some deficiencies in the tedious calculating process and neglect of shear deformation, respectively. To obtain a 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 the MFC laminated plate structure satisfy the deformation compatibility and stress balance. For instance, in the end displacement calculation of the MFC laminated beam structure. The experimental result of the MFC laminated beam is compared with those of the 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.
Highlights
As a widely used piezoelectric smart material, piezoceramics can have an actuating performance through the inverse piezoelectric effect and a sensing performance through the direct piezoelectric effect
The National Aeronautics and Space Administration (NASA) lab in Langley has developed a new type of piezoelectric smart material, macro fiber composite (MFC) [4], which is recombined with piezoceramic fiber rods with rectangular sections, an epoxy resin basal body, a copper electrode, and a polymer film
Because the sinusoidal shear deformation theory (SSDT) can precisely simulate the deformation and internal force calculation of laminated plate structures [25,26], this paper introduces a local displacement distribution function with the SSDT, proposes a new MFC actuating force formula, and performs contrastive analysis between the new formula and the one based on classical plate theory (CPT) [27,28]
Summary
As a widely used piezoelectric smart material, piezoceramics can have an actuating performance through the inverse piezoelectric effect and a sensing performance through the direct piezoelectric effect. Aiming for vibrational control of flexible structures, Wang et al [10] studied the optimal configuration of the MFC actuator, established a model for MFC integrated plate-shell structures with the finite element method, and obtained the actuating force of the MFC by the Hamilton’s principle. On this basis, they provided the best location and fiber orientation for MFCs in different working conditions. Is exemplified to analyze the MFC internal force distribution and free end displacement in different working conditions, which proves the applicability of the theory in this paper
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