Discontinuous shear thickening and dynamic shear jamming can be observed in the dense granular suspension. Here, we determine the criterion for the occurrence of shear jamming by studying the first normal stress difference $N_1$ of dense granular suspension in steady-state rheology. When $N_1=0$, the suspension is shear jammed, and the frictional contact dominates the framework. The jamming onset stress decreases when the particle volume fraction increases. The lubrication to friction mechanism predicts the occurrence of shear jamming and is consistent with the trend predicted by the Wyart–Cates model. The state of a dense granular suspension can be distinguished in the state diagram via the analysis of $N_1$. This work can aid understanding of the rheology of concentrated particle suspensions.

中文翻译：

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在致密的颗粒状悬浮液中发生剪切堵塞

在致密的颗粒状悬浮液中可以观察到不连续的剪切增稠和动态剪切堵塞。在这里，我们通过研究第一个法向应力差来确定发生剪切卡塞的标准${ñ}_{\mathrm{1个}}$稳态流变学中致密颗粒悬浮液的制备。什么时候${ñ}_{\mathrm{1个}}=0$，悬架被剪切卡住，摩擦接触支配了框架。当颗粒体积分数增加时，堵塞开始应力降低。摩擦机制的润滑可预测剪切卡塞的发生，并且与Wyart–Cates模型所预测的趋势一致。可以通过分析以下过程在状态图中区分稠密颗粒悬浮液的状态${ñ}_{\mathrm{1个}}$。这项工作有助于理解浓缩颗粒悬浮液的流变性。