Correlations of plasticity in sheared glasses
Autor: | Peter Schall, Suvendu Mandal, Daniel Vågberg, Dmitry Denisov, Vijaykumar Chikkadi, Dierk Raabe, Fathollah Varnik, Peter Olsson |
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Přispěvatelé: | Soft Matter (WZI, IoP, FNWI) |
Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
Physics
FOS: Physical sciences Hard spheres Plasticity Dissipation Condensed Matter - Soft Condensed Matter Atomic packing factor Power law Fusion Plasma and Space Physics Amorphous solid Fusion plasma och rymdfysik Drag colloidal glasses transition suspensions dynamics motion Soft Condensed Matter (cond-mat.soft) Statistical physics Exponential decay |
Zdroj: | Physical Review E, 89(4). American Physical Society |
ISSN: | 1550-2376 1539-3755 |
Popis: | In a recent paper [S. 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 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, 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 for the case of soft disks. 5 pages, 5 figures |
Databáze: | OpenAIRE |
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