1. Actively controllable size-dependent elastic wave band gaps in planar functionally graded micro-lattice.
- Author
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Li, Jingru, Li, Sheng, and Lin, Wei
- Subjects
- *
BAND gaps , *SPECTRAL element method , *STRAINS & stresses (Mechanics) , *THEORY of wave motion , *FINITE element method , *FUNCTIONALLY gradient materials , *ELASTIC waves - Abstract
A hybrid planar micro-lattice made of functionally graded materials is proposed where the active and passive constituents are constructed by functionally graded beams with and without partially distributed piezoelectric attachments respectively. The analytical model for predicting complex band structure is presented via the spectral element method in combination with the modified couple stress theory and power law, whose accuracy is validated by the finite element method. By adjusting size dependence, feedback control gain, material gradient and arrangement of piezo-patches, controllable wave propagation and attenuation is achieved, which further advances the implementation of optimizations to obtain ultra-wide low frequency stop bands. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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