Enhanced energy transfer and conversion for high performance phononic crystal-assisted elastic wave energy harvesting

Lee, Tae Gon; Jo, Soo-Ho; Seung, Hong Min; Kim, Sun Woo; Kim, Young Ho; Youn, Byeng D.; Nahm, Sahn; Kim, Miso

doi:10.1016/j.nanoen.2020.105226

Cited by 83 publications

(40 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When acoustic or elastic waves are generated in a phononic crystal system near a defect band frequency, they can become localized inside the defect while representing a certain defect mode shape [39,40]. Defect-mode-enabled energy localization has proven highly desirable for several potential applications, such as energy harvesting [20,41], wave filtering [42,43], and sensors [44,45].…”

Section: Introductionmentioning

confidence: 99%

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Shin

Yoon

et al. 2021

Nano Convergence

Self Cite

View full text Add to dashboard Cite

This study aims to investigate elastic wave localization that leverages defect band splitting in a phononic crystal with double defects through in-depth analysis of comparison of numerical and experimental results. When more than one defect is created inside a phononic crystal, these defects can interact with each other, resulting in a distinctive physical phenomenon from a single defect case: defect band splitting. For a phononic crystal consisting of circular-hole type unit cells in a thin aluminum plate, under A0 (the lowest antisymmetric) Lamb waves, both numerical simulations and experiments successfully confirm the defect band splitting phenomenon via frequency response functions for the out-of-plane displacement calculated/measured at the double defects within a finite distance. Furthermore, experimental visualization of in-phase and out-of-phase defect mode shapes at each frequency of the split defect bands is achieved and found to be in excellent agreement with the simulated results. Different inter-distance combinations of the double defects reveal that the degree of the defect band splitting decreases with the increasing distance due to weaker coupling between the defects. This work may shed light on engineering applications of a multiple-defect-introduced phononic crystal, including broadband energy harvesting, frequency detectors, and elastic wireless power transfer.

show abstract

Section: Introductionmentioning

confidence: 99%

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Shin

Yoon

et al. 2021

Nano Convergence

Self Cite

View full text Add to dashboard Cite

show abstract

“…The A 0 Lamb waves were induced by transversely (z-axis; out-of-plane) exciting a host structure positioned at the left domain of the PnC. In previous studies [30,35], when performing experiments of generation of A 0 Lamb waves using an array of several point sources (transducers that vertically loaded input forces) in a laboratory setup, it was shown that its amplitude was under several tens of nm at the frequency of several tens of Hz. Thus, the input setting is reasonable.…”

Section: System Configuration and Numerical Simulation Settingsmentioning

confidence: 99%

“…Several prior efforts have been dedicated to analytical/numerical modeling [32][33][34] and experimental demonstrations [35][36][37] of enhanced PEH strategies that leverage a PnC with a single defect. However, inherent challenges exist in that the bandwidth for PEH is considerably narrow, since the defect-mode-induced energy localization and harvesting approaches examined in previous research can be performed only at a single defect band frequency.…”

Section: Introductionmentioning

confidence: 99%

A Phononic Crystal with Differently Configured Double Defects for Broadband Elastic Wave Energy Localization and Harvesting

Youn

2021

Crystals

Self Cite

View full text Add to dashboard Cite

Several previous studies have been dedicated to incorporating double defect modes of a phononic crystal (PnC) into piezoelectric energy harvesting (PEH) systems to broaden the bandwidth. However, these prior studies are limited to examining an identical configuration of the double defects. Therefore, this paper aims to propose a new design concept for PnCs that examines differently configured double defects for broadband elastic wave energy localization and harvesting. For example, a square-pillar-type unit cell is considered and a defect is considered to be a structure where one piezoelectric patch is bonded to a host square lattice in the absence of a pillar. When the double defects introduced in a PnC are sufficiently distant from each other to implement decoupling behaviors, each defect oscillates like a single independent defect. Here, by differentiating the geometric dimensions of two piezoelectric patches, the defects’ dissimilar equivalent inertia and stiffness contribute to individually manipulating defect bands that correspond to each defect. Hence, with adequately designed piezoelectric patches that consider both the piezoelectric effects on shift patterns of defect bands and the characteristics for the output electric power obtained from a single-defect case, we can successfully localize and harvest the elastic wave energy transferred in broadband frequencies.

show abstract

“…Ambient vibration energy harvesting systems commonly operate at frequencies below 100 Hz, however synthesizing passive LC resonators at such frequencies requires the use of impractically large inductors. Here, elastic wave energy harvesting [31][32][33][34][35] is specifically chosen as the target application as the MDOF approach is best suited for operation in the >40 kHz frequency band.…”

Section: Design and Simulation Of A Low Frequency Elastic Wave Energy...mentioning

confidence: 99%

Multiple electrically tunable parametric resonances in a capacitively coupled electromechanical resonator for broadband energy harvesting

Surappa

Erdogan

Degertekin

2021

Smart Mater. Struct.

View full text Add to dashboard Cite

Parametric excitation (PE) has widely been employed as a method of mechanical pre-amplification in nonlinear vibration energy harvesting systems. However, despite their advantages, most current PE systems are limited to degenerate parametric operation within a narrow frequency band around the primary instability tongue. In this paper, we simulate and experimentally demonstrate a parametrically driven capacitive electromechanical resonator having multiple electrical degrees of freedom. Multiple modes allow for several frequency bands in which the electrical resonator is driven into nondegenerate (combination) parametric resonance (PR) in addition to degenerate resonance, thereby enabling operation over a broader range of frequencies while maintaining the same mechanical footprint. These frequency bands and PR thresholds are tunable by simply changing the electrical circuit parameters and PR can be achieved in the presence of high mechanical damping making the method more adaptable than purely mechanical approaches. Experimental results are extended by simulations indicating that proper selection of operating parameters can enable the merging of instability tongues to produce a broadband region of PR for elastic wave energy harvesting thereby obtaining superior performance when compared to an equivalent single degree of freedom PE energy harvester.

show abstract

Enhanced energy transfer and conversion for high performance phononic crystal-assisted elastic wave energy harvesting

Cited by 83 publications

References 38 publications

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

Double defects-induced elastic wave coupling and energy localization in a phononic crystal

A Phononic Crystal with Differently Configured Double Defects for Broadband Elastic Wave Energy Localization and Harvesting

Multiple electrically tunable parametric resonances in a capacitively coupled electromechanical resonator for broadband energy harvesting

Contact Info

Product

Resources

About