Propagation of short stress pulses in discrete strongly nonlinear tunable metamaterials | Zendy

Yichao Xu | Zendy; V. F. Nesterenko | Zendy

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Propagation of short stress pulses in discrete strongly nonlinear tunable metamaterials

Author(s) -

Yichao Xu,

V. F. Nesterenko

Publication year - 2014

Publication title -

philosophical transactions of the royal society a mathematical physical and engineering sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.074

H-Index - 169

eISSN - 1471-2962

pISSN - 1364-503X

DOI - 10.1098/rsta.2013.0186

Subject(s) - metamaterial , materials science , toroid , nonlinear system , stress (linguistics) , power law , power (physics) , attenuation , elastic modulus , stress wave , mechanics , optics , acoustics , physics , composite material , optoelectronics , mathematics , linguistics , philosophy , plasma , statistics , quantum mechanics

The propagation of short pulses with wavelength comparable to the size of a unit cell has been studied in a one-dimensional discrete metamaterial composed of steel discs alternating with toroidal nitrile O-rings under different levels of precompression using experiments, numerical simulations and theoretical analysis. This strongly nonlinear metamaterial is more tunable than granular chains composed of linear elastic spherical particles and has better potential for attenuation of dynamic loads. A double power-law relationship for compressed O-rings was found to describe adequately their quasi-static and dynamic behaviour with significantly different elastic moduli. It is demonstrated that the double power-law metamaterial investigated allows a dramatic increase in sound speed and acoustic impedance of three to four times using a moderate force.

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