Harnessing uniaxial tension to tune Poisson's ratio and wave propagation in soft porous phononic crystals: an experimental study.

Exerting mechanical loads on soft periodic porous phononic crystals provides a unique opportunity to control the propagation of waves through the peculiar band gaps. However, it is quite difficult to experimentally confirm the band gaps in soft materials owing to their viscosity and instability-prone character. We investigate here via experiments the effect of regulation of uniaxial tension on the band gaps in a 2D soft phononic crystal with criss-crossed elliptical holes which was designed based on the contrarian thinking to our previous study.