The deformation induced tunable topology in controlling of band gap characteristics for stepped phononic crystals

Wang, Y.F.; Guo, J. C.; Zhang, Zhao

doi:10.1016/j.ssc.2022.114809

Cited by 8 publications

(3 citation statements)

References 35 publications

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“…The relative band gap range of the cubic metamaterial proposed in the first row of table 1 is 132%. As the internal spherical resonator functions as a dense core, the energy of elastic waves becomes more localized within [64] Photopolymer High-resolution micro stereo lithography apparatus 73.7% Elmadih et al [65] Nylon PA12 Laser powder bed melting 26%-68% Guo and Zhang [16] AlSi10Mg Selective laser melting 48.7% Wang et al [66] Ti-6Al-4V Tungsten inert gas welding 33.0%…”

Section: Vibration Reduction Results and Discussionmentioning

confidence: 99%

High strength induced wide band gap formations in additively manufactured cubic metamaterial

Guo,

Li,

Wang

et al. 2024

Smart Mater. Struct.

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Strength and band gap are the two basic physical features of the cubic metamaterial. How to design band gap characteristics with high strength of structure is the key for the further industrial application in vibration control of the cubic metamaterial. Here a cubic metamaterial is designed by optimal selection of crystal orientation angle to obtain wide band gaps with high strength. The prototype samples were fabricated using advanced additive manufacturing technology to tensile-pressure experiments and sine frequency sweep experiment, thereby demonstrating the validity of the obtained results. Results indicated that the normalized bandwidth of SC metamaterials is 0.47 and the ultimate strength is 25.99 MPa. The normalized bandwidth is increased by 3.1 times and 47 times higher than that of the metamaterials of FCC and BCC. Its ultimate strength is increased by 3.5 times and 6.7 times. The static simulation results revealed that the maximum mises stress values of SC, FCC, and BCC metamaterials were 1.71MPa, 10.49MPa, and 31.40MPa respectively. The attenuation amplitude of the elastic wave measured by experiment is 80dB, which is consistent with the simulation results. The bandwidths of cubic metamaterials exhibit a positive correlation with their strength. The variation in crystal orientation angles plays a crucial role in elucidating the underlying mechanism behind the positive correlation between the strength and the band gap. The further buckling analysis of SC metamaterial with high strength and wide bandgap characteristics reveals that the negative Poisson's ratio structure experiences a reduction in bandwidth and strength as buckling deformation intensifies.

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Section: Vibration Reduction Results and Discussionmentioning

confidence: 99%

High strength induced wide band gap formations in additively manufactured cubic metamaterial

Guo,

Li,

Wang

et al. 2024

Smart Mater. Struct.

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“…Tan et al [60] studied the effect of distortion caused by friction stir additive manufacturing on the band gap of the designed phononic crystals, and the band gap frequency differences between the designed phononic crystals and the fabricated samples are in the range of 0.15%-0.55%. The small distortions caused by fabrication technology can lead to the increase of the second band gap of PnCs to be 1.5 time higher than initial design [61].…”

Section: Introductionmentioning

confidence: 98%

The influence of printing accuracy on the performance of additively manufactured AlSi10Mg phononic crystals

Wang¹,

Guo²,

Zhang³

2022

Phys. Scr.

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The printing accuracy is one of the key factors affecting the final additively manufactured structures. As metamaterials for wave controlling, the printing accuracy caused in additive manufacturing can affect the band gap structures and the wave transmissions in phononic crystals (PnCs). Selective laser melting (SLM) was used to fabricate the designed PnCs. AlSi10Mg was used as the material for the fabrication. The distorted geometry of the additively manufactured PnCs by selective laser melting (SLM) was experimentally measured and then was re-built as finite element model. The band gap structures and the wave transmissions were calculated based on finite element method for the comparison of the structural performances of the theoretically designed and fabricated PnCs. Result indicated that the fabricated PnCs were thermally distorted from 0.298 mm to 1.664 mm depending on the designed geometries. The thermal distortion can lead to a deviation of central frequency in the range of -6.2%~3.7% in comparison with the theoretical design. Compared with the theoretical design, the band gap widths of the distorted PnCs vary from -7.4% to 5.6% due to the frequencies change of the eigenmodes at the upper and lower band edges which are directly affected by the thermal distortion. The further analysis shows that the change of the band structures of the distorted PnCs is due to the increase of the inertia moment of the distorted PnCs caused by the printing accuracy.

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“…The changes of mechanical properties in laser additive manufacturing can be important factor determining the final dimensional accuracy incorporating the residual distortions [141] and can affect the further processing properties [142]. Residual stresses and distortions can be usually predicted by inherent strain method [143][144][145][146][147][148][149][150][151]. Although the method is valid and successful in many cases in current stage, the consideration of the mechanical property changes in the model using inherent strain method is still a challenge for the further development of models of residual states, which can be meaningful for the accurate controls of dimensional accuracy in laser additive manufacturing.…”

mentioning

confidence: 99%

A Review on Modelling and Simulation of Laser Additive Manufacturing: Heat Transfer, Microstructure Evolutions and Mechanical Properties

Zhang

Wang

2022

Coatings

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Modelling and simulation are very important for revealing the relationship between process parameters and internal variables like grain morphology in solidification, precipitate evolution, and solid-state phase transformation in laser additive manufacturing. The impact of the microstructural changes on mechanical behaviors is also a hot topic in laser additive manufacturing. Here we reviewed key developments in thermal modelling, microstructural simulations, and the predictions of mechanical properties in laser additive manufacturing. A volumetric heat source model, including the Gaussian and double ellipsoid heat sources, is introduced. The main methods used in the simulation of microstructures, including Monte Carlo method, cellular automaton, and phase field method, are mainly described. The impacts of the microstructures on mechanical properties are revealed by the physics-based models including a precipitate evolution based model and dislocation evolution based model and by the crystal plasticity model. The key issues in the modelling and simulation of laser additive manufacturing are addressed.

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The deformation induced tunable topology in controlling of band gap characteristics for stepped phononic crystals

Cited by 8 publications

References 35 publications

High strength induced wide band gap formations in additively manufactured cubic metamaterial

High strength induced wide band gap formations in additively manufactured cubic metamaterial

The influence of printing accuracy on the performance of additively manufactured AlSi10Mg phononic crystals

A Review on Modelling and Simulation of Laser Additive Manufacturing: Heat Transfer, Microstructure Evolutions and Mechanical Properties

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