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.

中文翻译：

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稠密软固体的屈服和流化中流动不均匀性的出现和持续存在。

在非布朗阻塞模型的三维计算机仿真中，我们通过分析在不同剪切速率下（有无约束）的应力和颗粒堆积来计算屈服时达到均匀流动所需的时间。我们表明，在完全流化之前，应力超调和持续剪切带受初始固体中微观区域的过度约束所控制。可以在使用的模型中以二十面体堆积的区域识别的此类区域允许在剪切启动过程中累积应力。它们在变形下的结构重组控制了剪切带的出现和持久性。