Soft particle packings near jamming: correlations in static structure
Kamran Karimi (Carnegie Mellon University), Craig Maloney (Carnegie Mellon University)
Multiscale Mechanics of Particulate Media
Mon 9:00 - 10:30
Sayles 105
We report on two-dimensional computer simulations of frictionless soft harmonic packings at various area fractions above the jamming point . We measure the anisotropy in coarse-grained stress s and shear modulus m as functions of coarse-graining scale, R. s can be collapsed onto a master curve after rescaling R by a characteristic length scale and s by an anisotropy magnitude A. Both A and accelerate as c from above, consistent with a divergence at c. m shows no characteristic length scale and has a nontrivial power-law form, m R0.62, over almost the entire range of R at all . These results suggest that the force chains present in the spatial structure of the quenched stress may be governed by different physics than the anomalous elastic response near jamming.