Unifying Impacts in Granular Matter from Quicksand to Cornstarch.
A sharp transition between liquefaction and transient solidification is observed during impact on a granular suspension depending on the initial packing fraction. We demonstrate, via high-speed pressure measurements and a two-phase modeling, that this transition is controlled by a coupling between the granular pile dilatancy and the interstitial fluid pressure generated by the impact. Our results provide a generic mechanism for explaining the wide variety of impact responses in particulate media, from dry quicksand in powders to impact hardening in shear-thickening suspensions like cornstarch.
Aix Marseille Univ, CNRS, IUSTI, 13013 Marseille, France.|Aix Marseille Univ, CNRS, Centrale Marseille, IRPHE, 13013 Marseille, France.
J John Soundar
JJ
Jerome
Aix Marseille Univ, CNRS, Centrale Marseille, IRPHE, 13013 Marseille, France.
Nicolas
N
Vandenberghe
Aix Marseille Univ, CNRS, IUSTI, 13013 Marseille, France.
Yoël
Y
Forterre