Impact protection enhancement by negative mass meta-honeycombs with local resonance plates

Huang, Yao; Wu, Jiu Hui; Lei, Yunzhong; Niu, Jiamin

doi:10.1016/j.compstruct.2023.117330

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…The latter is a second-order symmetric tensor due to the symmetries of D 0 , and it is also positive definite. In fact, due to the strong ellipticity condition (8), one has…”

Section: Dispersion Properties: Band Gaps and Polarization Bandsmentioning

confidence: 99%

“…In particular, periodic materials with heavy, stiff inclusions with a soft coating embedded in a stiff matrix have been demonstrated to have broad spectral gaps at low frequency, see, for example [1,2]. The intervals of frequency inside which waves are attenuated can have different applications in vibration isolation and impact absorption [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Wave Polarization Control in Anisotropic Locally Resonant Materials

Faraci,

Mendicino,

Vincenti

et al. 2023

Applied Sciences

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Elastic wave propagation in solids can be controlled and manipulated by properly designed metamaterials. In particular, polarization conversion can be obtained by using anisotropic materials. In this paper, we propose a three-component locally resonant material with non-symmetrically coated inclusions, and we study the effect of the anisotropic equivalent mass on band gap formation and the polarization conversion of elastic waves. The equivalent frequency-dependent mass tensor is obtained through the two-scale homogenization approach. The study of the eigenvalues of the mass tensor enables to predict band gaps and polarization bands, as well as identifying a priori the effect of different geometric and material parameters, thus opening the way to metamaterial optimization.

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“…The latter is a second-order symmetric tensor due to the symmetries of D 0 , and it is also positive definite. In fact, due to the strong ellipticity condition (8), one has…”

Section: Dispersion Properties: Band Gaps and Polarization Bandsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wave Polarization Control in Anisotropic Locally Resonant Materials

Faraci,

Mendicino,

Vincenti

et al. 2023

Applied Sciences

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“…In 2000, Liu et al [18] reported local resonance phononic crystal, the structure can manipulate large wavelength acoustic energy by small size structure [19], broadening the study of low-frequency bandgap [20]. The emergence of the local resonance mechanism broke through the limitations of the traditional Bragg scattering bandgap [21,22] and promoted the research of the local resonance mechanism to generate the bandgap [23,24]. For example, He et al [25] proposed a column structure of locally resonant elastic metamaterial based on composite materials.…”

Section: Introductionmentioning

confidence: 99%

Auxetic hybrid metamaterial with tunable elastic wave bandgap

Chen,

Tao,

Luo

et al. 2024

Smart Mater. Struct.

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Auxetic metamaterials have shown good stability and uniform deformation capabilities against influences (vibration, temperature change, load change), making them significant in maintaining and adjusting the bandgap of phonon crystals. The low-frequency and broadband are the important goals of phonon crystals. For most traditional re-entrant honeycomb structures (T-RHS), the bandgap range is narrow and tunability is poor. Here, an auxetic hybrid structure with tunable acoustic bandgap (AHS-T) consisting of periodic mass inclusions integrated with traditional re-entrant honeycomb and chiral hybrid is proposed. Aiming at investigating the tunability of the bandgap in the low-frequency range. Compared with T-RHS, the bandgap real-time adjustment and wider bandwidth of the AHS-T be realized during compression and tension. The numerical results show that the bandgap of the AHS-T can be flexibly tailored by reasonably adjusting the strain and geometrical configurations of AHS-T. The bandwidth of AHS-T can be increased to 87.1% when the bottom diameter and column height H of the scatterer are changed reasonably. Moreover, the deformation behavior of auxetic material has an auxiliary effect on expanding the bandwidth. Compared with the structure which is not subjected to load, the adjustable amplitude of the bandgap is 41%. The findings of this work provide a design idea for manipulating elastic waves in dynamic environment.

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