Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
复制标题
致密软固体的屈服和流化过程中流动不均匀性的出现和持续
DOI：
10.1103/physreve.102.010604
复制
发表时间：
2020
影响因子：
2.4
通讯作者：
Del Gado, Emanuela
中科院分区：
文献类型：
--
作者：
Vasisht, Vishwas Venkatesh;Roberts, Gabrielle;Del Gado, Emanuela
In three-dimensional computer simulations of model non-Brownian jammed suspensions, we compute the time required to reach homogeneous flow upon yielding, by analyzing stresses and particle packing at different shear rates, with and without confinement. We show that the stress overshoot and persistent shear banding preceding the complete fluidization are controlled by the presence of overconstrained microscopic domains in the initial solids. Such domains, identifiable with icosahedrally packed regions in the model used, allow for stress accumulation during the shear startup. Their structural reorganization under deformation controls the emergence and the persistence of the shear banding.
