Programmable Moving Defect for Spatiotemporal Wave Localization in Piezoelectric Metamaterials

Thomes, Renan Lima; Beli, Danilo; Sugino, Christopher; Ertürk, Alper; Marqui, Carlos De

doi:10.1103/physrevapplied.19.064031

Cited by 4 publications

(1 citation statement)

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“…Furthermore, integrating piezoelectric materials, renowned for their intelligent properties [13,14], into the design step of defective PnCs starts devising various engineering prototypes that harness the potential of defect-mode-induced wave localization [15][16][17][18]. These piezoelectric materials can serve as useful defects themselves or be strategically attached to defect sites.…”

Section: Introductionmentioning

confidence: 99%

Defect-Band Splitting of a One-Dimensional Phononic Crystal with Double Defects for Bending-Wave Excitation

Jo,

Lee,

Youn

2023

Mathematics

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Extensive prior research has delved into the localization of elastic wave energy through defect modes within phononic crystals (PnCs). The amalgamation of defective PnCs with piezoelectric materials has opened new avenues for conceptual innovations catering to energy harvesters, wave filters, and ultrasonic receivers. A recent departure from this conventional paradigm involves designing an ultrasonic actuator that excites elastic waves. However, previous efforts have mostly focused on single-defect scenarios for bending-wave excitation. To push the boundaries, this research takes a step forward by extending PnC design to include double piezoelectric defects. This advancement allows ultrasonic actuators to effectively operate across multiple frequencies. An analytical model originally developed for a single-defect situation via Euler–Bernoulli beam theory is adapted to fit within the framework of a double-defect set-up, predicting wave-excitation performance. Furthermore, a comprehensive study is executed to analyze how changes in input voltage configurations impact the output responses. The ultimate goal is to create ultrasonic transducers that could have practical applications in nondestructive testing for monitoring structural health and in ultrasonic imaging for medical purposes.

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