61 citations · 115 across the 8 of their papers we have counts for
8 papers
Seismic Wave Scattering and Dissipation in Fractured Shales
Hao Zhou, Xiaoping Jia, Li-Yun Fu +1
Seismic attenuation in granular porous media is of paramount importance in rock physics and seismology. Unlike sandstones, shales are mixtures of sand grains and clays with extreme…
Shear-wave-induced softening and simultaneous compaction in dense granular media through acoustic lubrication at flow heterogeneities
Charles K. C. Lieou, Jerome Laurent, Paul A. Johnson +1
We report the simultaneous softening and compaction of a confined dense granular pack in acoustic resonance experiments. Elastic softening is manifested by a reduction of the shear…
Ultrasonic tracking of a sinking ball in a vibrated dense granular suspension
S. van den Wildenberg, X. Jia, J. Léopoldès +1
Observing and understanding the movement of an intruder through opaque dense suspensions such as quicksand remains a practical and conceptual challenge. Here we use an ultrasonic p…
Drastic slowdown of shear waves in unjammed granular suspensions
J. Brum, J. -L. Gennisson, M. Fink +2
We present an experimental investigation of shear elastic wave propagation along the surface of a dense granular suspension. Using an ultrafast ultrasound scanner, we monitor the s…
Dynamic induced softening in frictional granular material investigated by DEM simulation
Laure Lemrich, Paul A. Johnson, Robert Guyer +2
A granular system composed of frictional glass beads is simulated using the Discrete Element Method. The inter-grain forces are based on the Hertz contact law in the normal directi…
Time reversal of ultrasound in granular media
Maxime Harazi, Yougu Yang, Mathias Fink +2
Time reversal (TR) focusing of ultrasound in granular packings is experimentally investigated. Pulsed elastic waves transmitted from a compressional or shear transducer source are…