The control of ultrasonic transmission by the metamaterials structure of electrorheological fluid and metal foam

Linlin Li, Mingzhong Wang, Jiahui Wang, Xiaopeng Zhao

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A metamaterial structure formed by foamed metal and starch and oil-based electrorheological (ER) fluid is designed in this paper. Experiments show that the metamaterial structure exhibits a regulation effect on the amplitude and phase of the transmitted waves of 35-80 kHz ultra-wideband ultrasonic waves in water. With the increase of the electric field, the transmission amplitude and phase of the ultrasonic wave increases, whereas the control ability of the same gradient electric field decreases. The amplitude of the transmission controlled by the metamaterial structure and electric field increases at first, and then decreases with the increase in volume fraction of the ER fluid. Thus, it is thought that the interaction between the microstructure produced by the rheological properties of the ER fluid and the porous foam metal affects the propagation of the acoustic wave.

Original languageEnglish
Article number115006
JournalSmart Materials and Structures
Volume26
Issue number11
DOIs
StatePublished - 29 Sep 2017

Keywords

  • metal foam and ER fluid metamaterials structure
  • regulation
  • ultrasonic transmission

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