TY  - JOUR
PY  - 2012//
TI  - Shocks near Jamming
JO  - Physical review letters
A1  - Gómez, Leopoldo R.
A1  - Turner, Ari M.
A1  - van Hecke, Martin
A1  - Vitelli, Vincenzo
SP  - 058001
EP  - 058001
VL  - 108
IS  - 5
N2  - Nonlinear sound is an extreme phenomenon typically observed in solids after violent explosions. But granular media are different. Right when they jam, these fragile and disordered solids exhibit a vanishing rigidity and sound speed, so that even tiny mechanical perturbations form supersonic shocks. Here, we perform simulations in which two-dimensional jammed granular packings are dynamically compressed and demonstrate that the elementary excitations are strongly nonlinear shocks, rather than ordinary phonons. We capture the full dependence of the shock speed on pressure and impact intensity by a surprisingly simple analytical model.<p />  <p>Language: en</p>
LA  - en
SN  - 0031-9007
UR  - http://dx.doi.org/
ID  - ref1
ER  -