Anisotropic phononic crystal structure with low-frequency bandgap and heat flux manipulation

Guo, Tao; Yang, Xiongwei; Geng, Qian; Li, Zhen; Li, Yueming; Wang, Xian; Hu, Zhang

doi:10.1007/s11433-019-9437-x

Cited by 11 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The existing research work on EMs (Lee and Iizuka, 2019; Wang and Wang, 2018; Yz et al. , 2022; Guo et al ., 2020; Kumar and Pal, 2020; Xue et al ., 2020) mainly focused on one-dimensional and two-dimensional structures, and rarely involve three-dimensional EM. Sigalas et al.…”

Section: Introductionmentioning

confidence: 99%

“…The existing research work on EMs (Lee and Iizuka, 2019;Wang and Wang, 2018;Yz et al, 2022;Guo et al, 2020;Kumar and Pal, 2020;Xue et al, 2020) mainly focused on onedimensional and two-dimensional structures, and rarely involve three-dimensional EM. Sigalas et al (Sigalas and Soukoulis, 1995) first proved theoretically the existence of elastic wave bandgap in three-dimensional periodic lattice materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bandgap mechanisms and wave characteristics analysis of a three-dimensional elastic metastructure

Peng

et al. 2023

IJSI

View full text Add to dashboard Cite

PurposeIn order to investigate the vibration reduction properties of a three-dimensional elastic metastructure with spherical cavities at low frequencies.Design/methodology/approachThe bandgap characteristics of a three-dimensional elastic metastructure with spherical cavities are studied based on analytical and numerical approaches.FindingsThe results of both method revealed that the vibration of the vertexes masses is important for opening bandgaps. The fact that the big sphere cavity radius or short side length of the cube unit leads to a wider bandgap, is noteworthy.Originality/valueThis research provides theoretical guidance for realizing the vibration attenuation application of EMs in practical engineering.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bandgap mechanisms and wave characteristics analysis of a three-dimensional elastic metastructure

Peng

et al. 2023

IJSI

View full text Add to dashboard Cite

show abstract

“…Regarding the thermally induced local buckling deformation, a surge in the bandgap frequency and bandwidth for a Lamb wave was observed at the critical buckling temperature of a ternary PC plate [34]. Conversely, reductions in the bandgap frequency and bandwidth were caused by the increment of thermal stress in locally resonant PC plates [35][36][37][38][39]. By employing a 3D printing technique, a metastructure was proposed by combining local resonators and a periodic architected lattice [40].…”

Section: Introductionmentioning

confidence: 99%

Defect coupling behavior and flexural wave energy harvesting of phononic crystal beams with double defects in thermal environments

Geng¹,

Wu²,

Li³

2021

J. Phys. D: Appl. Phys.

Self Cite

View full text Add to dashboard Cite

As an effective means to manipulate elastic wave energy, the defect mode of phononic crystals (PCs) has recently been employed to implement vibration energy harvesting by localizing waves within certain areas at defect frequencies. Prior research has indicated that the thermal environment affects the defect behavior and energy harvesting of single defects. However, the dynamic characteristics of multi-defect phononic crystals have not yet been discussed. This paper presents an investigation of the coupling behavior and energy harvesting of double defects in heated PC beams. The frequencies and mode shapes of defect modes are studied for different defect pairs within the first bandgap. Results indicate that the difference in the single-defect frequency between the two defects plays a dominant role in determining the intensity of the defect interaction which splits the defect modes. Meanwhile, the influence of the energy distribution around the defects on the coupling behavior becomes prominent when the two defects are quite close to each other. These two factors could cause degeneration of the defect modes. As an external factor, thermal load could enhance the defect coupling intensity, and may reactivate the degenerated defect modes. This effect would increase as the initial defect interaction gets stronger. For vibration energy harvesting, temperature rise may lead to a significant reduction in defect-based harvested energy, even though the number of defect-induced resonance peaks could be increased in the thermal environment. The thermosensitivity of harvesting performance varies greatly for different combinations of defects. Thermal effects should be considered in the design of defect-based harvesters.

show abstract

Widening the frequency bandgap and reducing thermal conductivity in phononic crystals by tuning structural parameters using a novel computational simulation method

Bun,

Pathak,

Wang

2024

J Therm Anal Calorim

View full text Add to dashboard Cite

This paper introduces and models a phononic structure based on single-crystal silicon, aiming to investigate the width of its frequency bandgap and the impact of key parameters on thermal conductivity. The modeled phononic crystal structure features a periodic arrangement of cylindrical holes in a silicon matrix. This research holds the potential to enhance thermal management performance of thermal metamaterials. Utilizing a 3D finite element method (FEM) model in COMSOL, we have computed phonon dispersion to estimate thermal conductivity. The study systematically has explored the influence of phononic crystal parameters—specifically, porosity, lattice constant, and thickness—along with their interactions on both thermal conductivity and frequency bandgap width.A comprehensive investigation of these parameters has been conducted for their optimization to achieve the maximum frequency bandgap width and minimum thermal conductivity using the response surface method model. Eigenfrequencies and wave vector parameters are extracted from the finite element model using a MATLAB script. Subsequently, thermal conductivity is calculated through the Callaway–Holland model, a simplification of the Boltzmann transport equation (BTE).Our results indicate that the frequency bandgap begins to form at approximately 43% porosity for a lattice constant and thickness of 100 nm each. Furthermore, adjusting the parameters led to a significant reduction in thermal conductivity, decreasing from 43.89 W m−1 K−1 to 0.39 W m−1 K−1. The novelty of our research lies in thermal conductivity control of phononic crystal metamaterials through their parameter variations, or a predictive method of thermal conductivity and its parameter sensitivity. This study advances the state of the art in phononic crystal metamaterial research, contributing to improved thermal management performance by enlarging frequency bandgaps.Overall, our findings deepen the understanding of how porosity, lattice constant, and thickness influence thermal conductivity and frequency bandgap width. They offer valuable insights into optimizing phononic crystal parameters, enhancing thermal management performance, and designing more efficient and effective phononic crystal structures.

show abstract

Anisotropic phononic crystal structure with low-frequency bandgap and heat flux manipulation

Cited by 11 publications

References 34 publications

Bandgap mechanisms and wave characteristics analysis of a three-dimensional elastic metastructure

Bandgap mechanisms and wave characteristics analysis of a three-dimensional elastic metastructure

Defect coupling behavior and flexural wave energy harvesting of phononic crystal beams with double defects in thermal environments

Widening the frequency bandgap and reducing thermal conductivity in phononic crystals by tuning structural parameters using a novel computational simulation method

Contact Info

Product

Resources

About