Correlations of plasticity in sheared glasses
2014 (English)In: Physical Review E. Statistical, Nonlinear, and Soft Matter Physics, ISSN 1539-3755, Vol. 89, no 4, 040301- p.Article in journal (Refereed) Published
In a recent paper [Mandal et al., Phys. Rev. E 88, 022129 (2013)], the nature of spatial correlations of plasticity in hard-sphere glasses was addressed both via computer simulations and in experiments. It was found that the experimentally obtained correlations obey a power law, whereas the correlations from simulations are better fitted by an exponential decay. We here provide direct evidence-via simulations of a hard-sphere glass in two dimensions (2D)-that this discrepancy is a consequence of the finite system size in the 3D simulations. By extending the study to a 2D soft disk model at zero temperature [Durian, Phys. Rev. Lett. 75, 4780 (1995)], the robustness of the power-law decay in sheared amorphous solids is underlined. Deviations from a power law occur when either reducing the packing fraction towards the supercooled regime in the case of hard spheres or changing the dissipation mechanism from contact dissipation to a mean-field-type drag in the case of soft disks.
Place, publisher, year, edition, pages
American physical society , 2014. Vol. 89, no 4, 040301- p.
colloidal glasses; transition; suspensions; dynamics; motion
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-88669DOI: 10.1103/PhysRevE.89.040301ISI: 000333983100001OAI: oai:DiVA.org:umu-88669DiVA: diva2:717872