Designing a phononic crystal with a defect for energy localization and harvesting: Supercell size and defect location

Jo, Soo-Ho; Yoon, Heonjun; Shin, Yong Chang; Choi, Wonjae; Park, Choon-Su; Kim, Miso; Youn, Byeng D.

doi:10.1016/j.ijmecsci.2020.105670

Cited by 98 publications

(30 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that among the five defect mode shapes, we focus on the certain defect band frequency of 59.65 kHz because the out-of-plane monopole-like defect mode shape at this frequency, as shown in Additional file 1: Fig. S4, was found to be most advantageous for minimizing voltage cancellation [58,59] when incorporating defect modes of phononic crystals into energy harvesting applications, as addressed in previous studies [39,40,51,60].…”

Section: Resultsmentioning

confidence: 99%

“…When a single defect is created in a phononic crystal by locally breaking the periodicity of unit cells, such as by replacing a unit cell with another structure having different material or geometry, flat passbands (i.e., defect bands) are generated within a phononic band gap [37,38]. 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%

“…All defects are deployed at the centerline along the x 2 -direction. The reason for selecting the 4th unit cell as the fixed defect is that it proved to be the desirable location in terms of the highest energy localization performance for a phononic crystal with a single defect in our previous study [39,55].…”

Section: Single or Double Defects-introduced Phononic Crystal Designmentioning

confidence: 99%

See 2 more Smart Citations

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: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Single or Double Defects-introduced Phononic Crystal Designmentioning

confidence: 99%

See 1 more Smart Citation

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

“…These SNs are mostly deployed in external environments, which motivates the use of energy harvesting [ 106 , 107 ]. In this context, a few energy harvesting techniques for the prolonging of network lifetime have been presented in the literature [ 108 , 109 , 110 , 111 ]. Furthermore, machine learning (ML) algorithms integrated with energy harvesting technology are also candidates for improving network lifetime and performance by predicting the amount of energy to be harvested from ambient in a specific duty cycle [ 112 , 113 ].…”

Section: Future Directionsmentioning

confidence: 99%

A Systematic Review of Location Aware Schemes in the Internet of Things

Khan

Saboor

Kim

et al. 2021

Sensors

View full text Add to dashboard Cite

The rapid development in wireless technologies is positioning the Internet of Things (IoT) as an essential part of our daily lives. Localization is one of the most attractive applications related to IoT. In the past few years, localization has been gaining attention because of its applicability in safety, health monitoring, environment monitoring, and security. As a result, various localization-based wireless frameworks are being presented to improve such applications’ performances based on specific key performance indicators (KPIs). Therefore, this paper explores the recently proposed localization schemes in IoT. Initially, this paper explains the major KPIs of localization. After that, a thorough comparison of recently proposed localization schemes based on the KPIs is presented. The comparison includes an overview, architecture, network structure, performance parameters, and target KPIs. At the end, possible future directions are presented for the researchers working in this domain.

show abstract

“…The acoustic energy is localized in the unit cell due to the reverse vibration of the matrix as well as the local resonator and finally the BG is opened in the low frequency range. By combining the BG characteristics and defect state characteristics of PnCs or introducing functional materials and designing special structures, etc., PnCs can have a wider application prospect in acoustic device design and acoustic signal processing, such as the optimization of acoustic device design including sound insulation and vibration reduction structure 14 , acoustic waveguide 15 as well as acoustic filter 16 and improvement of acoustic collimation 17 , acoustic focusing 18 , 19 , acoustic energy recovery 20 , 21 as well as other technologies.…”

Section: Introductionmentioning

confidence: 99%

Tunable characteristics of low-frequency bandgaps in two-dimensional multivibrator phononic crystal plates under prestrain

Zhu

Sun

Song

et al. 2021

Sci Rep

View full text Add to dashboard Cite

In view of the influence of variability of low-frequency noise frequency on noise prevention in real life, we present a novel two-dimensional tunable phononic crystal plate which is consisted of lead columns deposited in a silicone rubber plate with periodic holes and calculate its bandgap characteristics by finite element method. The low-frequency bandgap mechanism of the designed model is discussed simultaneously. Accordingly, the influence of geometric parameters of the phononic crystal plate on the bandgap characteristics is analyzed and the bandgap adjustability under prestretch strain is further studied. Results show that the new designed phononic crystal plate has lower bandgap starting frequency and wider bandwidth than the traditional single-sided structure, which is due to the coupling between the resonance mode of the scatterer and the long traveling wave in the matrix with the introduction of periodic holes. Applying prestretch strain to the matrix can realize active realtime control of low-frequency bandgap under slight deformation and broaden the low-frequency bandgap, which can be explained as the multiple bands tend to be flattened due to the localization degree of unit cell vibration increases with the rise of prestrain. The presented structure improves the realtime adjustability of sound isolation and vibration reduction frequency for phononic crystal in complex acoustic vibration environments.

show abstract

Designing a phononic crystal with a defect for energy localization and harvesting: Supercell size and defect location

Cited by 98 publications

References 42 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 Systematic Review of Location Aware Schemes in the Internet of Things

Tunable characteristics of low-frequency bandgaps in two-dimensional multivibrator phononic crystal plates under prestrain

Contact Info

Product

Resources

About