Probing the shear-band formation in granular media with sound waves.

@article{Khidas2012ProbingTS,
  title={Probing the shear-band formation in granular media with sound waves.},
  author={Yacine Khidas and Xiaoping Jia},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  year={2012},
  volume={85 5 Pt 1},
  pages={051302}
}
We investigate the mechanical responses of dense granular materials, using a direct shear box combined with simultaneous acoustic measurements. Measured shear wave speeds evidence the structural change of the material under shear, from the jammed state to the flowing state. There is a clear acoustic signature when the shear band is formed. Subjected to cyclic shear, both shear stress and wave speed show the strong hysteretic dependence on the shear strain, likely associated with the geometry… CONTINUE READING