Journal
FRONTIERS IN PHYSICS
Volume 9, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2021.667103
Keywords
jamming transition; rheology; shearflow; molecular dynamics simualtion; non-equilibirum phase transition
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Funding
- JSPS KAKENHI [18H01188, 18K13464, 19K03767, 20H05157, 20H00128, 20H01868, 20J00802, 20K14436]
- Grants-in-Aid for Scientific Research [19K03767, 18H01188, 18K13464, 20H00128, 20H05157, 20J00802, 20K14436] Funding Source: KAKEN
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This study uses molecular dynamics simulations to investigate the mechanical responses of dense packings of soft athermal spheres under finite-rate shear, focusing on the fluctuations in shear stress and interparticle contact number. By defining susceptibility as the ratio of global to local fluctuations, ridges reminiscent of Widom lines around the critical point in an equilibrium phase transition are observed on the volume fraction-shear rate plane.
The mechanical responses of dense packings of soft athermal spheres under a finite-rate shear are studied by means of molecular dynamics simulations. We investigate the volume fraction and shear rate dependence of the fluctuations in the shear stress and the interparticle contact number. In particular, we quantify them by defining the susceptibility as the ratio of the global to local fluctuations. The obtained susceptibilities form ridges on the volume fraction-shear rate plane, which are reminiscent of the Widom lines around the critical point in an equilibrium phase transition.
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