Design of nacreous composite material for vibration isolation based on band gap manipulation

[Display omitted] •Two kinds of nacreous phononic crystals are compared to discuss the band structure.•A multi-level substructure algorithm is employed which is efficient and accurate.•The influences on the band gap with material and geometric parameters are examined.•A 3D nacreous material is desig...

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Bibliographic Details
Published in:Computational materials science 2015-05, Vol.102, p.126-134
Main Authors: Yin, J., Peng, H.J., Zhang, S., Zhang, H.W., Chen, B.S.
Format: Article
Language:English
Subjects:
Algorithms
Band gap manipulation
Band structure of solids
Composite materials
Mathematical models
Multi-level substructure
Nacreous
Nacreous composite material
Phononic crystal
Three dimensional
Two dimensional
Vibration
Vibration isolation
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Summary:[Display omitted] •Two kinds of nacreous phononic crystals are compared to discuss the band structure.•A multi-level substructure algorithm is employed which is efficient and accurate.•The influences on the band gap with material and geometric parameters are examined.•A 3D nacreous material is designed with an ultrawide low frequency band gap.•The numerical tests reveal the significant vibration attenuation of the material. Inspired by natural nacreous materials with the excellent performance, two kinds of two-dimensional (2D) phononic crystals with the Brick-and-Mortar pattern are compared. To discuss the band structure, a multi-level substructure algorithm is employed which is efficient. Additionally, the influences on the band gap with different material and geometric parameters of the model are examined, and the range of the band gap is turned out to be adjustable by changing these parameters. Furthermore, a kind of 3D nacreous composite material is designed based on the thought of staggered and combined soft and hard materials. In the 3D band structure analysis, the designed material generates an ultrawide low frequency band gap, similar to the results of the 2D case. The further numerical tests for the transmission characteristics and random vibration response reveal the significant vibration attenuation effect of the nacreous material compared with the reference materials. The results of the tests fit remarkably well with the band gap. Thus the devices for vibration reduction and isolation with various working frequencies can be designed by means of manipulating the band gap in the low frequency regime.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2015.01.032